McKillup, Steve
Statistics explained : an introductory guide for life sciences
Cambridge University Press, 2011
 Buku Teks
Milton, Janet Susan
Statistical methods in the biological and health sciences
McGraw-Hill , 1992
 Buku Teks
Milton, Janet Susan
Statistical methods in the biological and health sciences
McGraw-Hill, 1983
 Buku Teks
Analyzing qualitative data
edited by Alan Bryman, Robert G. Burgess
Routledge , 1995
 Buku Teks
Creswell, John W.
Research design : qualitative, quantitative, and mixed methods approaches
Sage Publication, Inc, 2003
 Buku Teks