1 Takahashi, S., "The Manga Guide to Statistics" No Starch Press, Inc 66-74, 2011
2 Cebu Port Authority, "Statistics. Shipcalls 2011 vs 2010"
3 Kristiansen, S., "Maritime Transportation Safety Management and Risk Analysis" Elsevier xutterworth- Heinemann 8-9, 2005
4 Philippine Ports Authority, "Annual Port Statistics by Port in Excel Files, 2011 Statistics (January-December), Nationwide Summary by PMO by Type of Port"
1 Takahashi, S., "The Manga Guide to Statistics" No Starch Press, Inc 66-74, 2011
2 Cebu Port Authority, "Statistics. Shipcalls 2011 vs 2010"
3 Kristiansen, S., "Maritime Transportation Safety Management and Risk Analysis" Elsevier xutterworth- Heinemann 8-9, 2005
4 Philippine Ports Authority, "Annual Port Statistics by Port in Excel Files, 2011 Statistics (January-December), Nationwide Summary by PMO by Type of Port"