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1 송성문, "정통종합영어" 성문사 2007
2 Gisborne, N., "clauses in Hong Kong English in: Hong Kong English: Autonomy and Creativity" Hong Kong University Press 141-160, 2002
3 Terkel, S., "Working.New" Avon 1975
4 Newbrook, M., "Which way? That way? Variation and ongoing changes in the English relative clause" 17 : 43-59, 1998
5 Levey, S., "Visiting London relatives" 27 : 45-70, 2006
6 Cheshire, J., "Variation in an English Dialect" Cambridge University Press 1982
7 Shnukal. A., "There's a Lot Mightn't Believe This ... : Variable subject relative pronoun absence in Australian English in: Variation Omnibus" Linguistic Research 312-328, 1981
8 Bisenbach-Lucas, S., "The use of relative markers in modern American English in: Variation in Language: NWAV-XV at Stanford" Stanford University,Linguistics Depa 13-21, 1987
9 Kikai, A., "The influence of syntactic position on relativization strategies in: Variation in Language" NWAV-XV at Stanford 267-277, 1987
10 Greenbaum, S., "The Oxford English Grammar" Oxford University Press 1996
11 Peitsara, K., "Somerset relativizers revisited in: Types of Variation: Diachronic, Dialectal and Typological Interfaces" John Benjamins 269-280, 2006
12 Jung, K. T., "Some lexico-grammatical features of Korean English Newspapers" 18 : 23-37, 1999
13 Adamson, H. D., "Social and processing constraints on relative clauses" 69 : 71-79, 1992
14 "Seppa쮖en, A. (1999). Dialectal variation in English relativization. Lingua 109, 15-34"
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18 Quirk, R., "Relative clauses in educated spoken English" 38 : 97-109, 1957
19 Guy, G. R., "On the choice of relative pronouns in English" 70 : 148-162, 1995
20 Flanigan, B. O., "Object relative pronoun use in native and non-native English" 7 : 203-226, 1996
21 Tagliamonte, S.., "No taming the vernacular! Insights from the relatives in Northern Britain" 17 : 75-112, 2005
22 김덕기, "High School English II" 금성출판사 2007
23 이맹성, "High School English I" 지학사 2007
24 Sankoff, D., "Goldvarb X: A multivariate analysis application" University of Ottawa 2005
25 Ball, C. N. A., "Diachronic study of relative markers in spoken and written English" 7 : 227-258, 1996
26 Hackenberg, R., "Appalachian English: A Sociolinguistic Study" Georgetown University 1972
27 Guy, G. R., "Advanced varbrul analysis" 30 : 124-136, 1988