1 S. Kuno, "The position of relative clauses and conjunctions" 5 : 117-136, 1974
2 M. Celce-Murcia, "The grammar book: Rowley" Newbury House 372-373, 1983
3 R. Cowan, "The Teacher’s Grammar of English" Cambridge University Press 2013
4 Sung Shick Cho, "The New Standard English Grammar" Korea University Press 495-, 1977
5 R. Huddleston, "The Cambridge Grammar of the English Language" Cambridge University Press 1033-1036, 2002
6 Yu Jeong Lee, "Teaching English Relative Pronouns for Korean EFL High School Students" the Graduate School of Education, Chosun University 2010
7 G. O. Curme, "Syntax" Healthy and Company 46-, 1947
8 D. Nunan, "Second Language teaching & learning" Heinle & Heinle 2004
9 Bas Aarts, "Oxford Modern English Grammar" Oxford University Press Inc 179-202, 2011
10 Mun-Koo Kang, "Modern English Grammar" Hankookmunhwasa 2017
1 S. Kuno, "The position of relative clauses and conjunctions" 5 : 117-136, 1974
2 M. Celce-Murcia, "The grammar book: Rowley" Newbury House 372-373, 1983
3 R. Cowan, "The Teacher’s Grammar of English" Cambridge University Press 2013
4 Sung Shick Cho, "The New Standard English Grammar" Korea University Press 495-, 1977
5 R. Huddleston, "The Cambridge Grammar of the English Language" Cambridge University Press 1033-1036, 2002
6 Yu Jeong Lee, "Teaching English Relative Pronouns for Korean EFL High School Students" the Graduate School of Education, Chosun University 2010
7 G. O. Curme, "Syntax" Healthy and Company 46-, 1947
8 D. Nunan, "Second Language teaching & learning" Heinle & Heinle 2004
9 Bas Aarts, "Oxford Modern English Grammar" Oxford University Press Inc 179-202, 2011
10 Mun-Koo Kang, "Modern English Grammar" Hankookmunhwasa 2017
11 Jae Jin Jang, "Man to Man Basic English" Man to Man 146-, 2001
12 O. Jespersen, "Essentials of English Grammar" George Allen & Unwin Ltd 361-362, 1956
13 R. Murphy, "English Grammar in Use for Intermediate Students" Cambridge University Press 2002
14 Sung-Shick Cho, "English Grammar Research 1" Shinasa 382-388, 1983
15 R. Quirk, "Concise Grammar of Contemporary English" Harcourt Brace Jovanovich Inc 208-, 1973
16 O. Jespersen, "Analytic Syntax" Holt, Rinehart and Winston, Inc 120-, 1965
17 Sung Shick Cho, "An Advanced English Grammar" Korea University Press 324-, 1971
18 Jong Uk Choi, "A Study on English Relative Pronouns ‘that’" 6 : 199-217, 2000
19 G. Yule, "A New English Grammar" Clarendon Press 182-, 1988
20 O. Jespersen, "A Modern English Grammar on Historical Principle, part Ⅲ" George Allen & Unwin Ltd 58-, 1961
21 Yang-Soon Kim, "A Grammar for English Experts" Dongin 2001