Leavel, Hugh Rodman
Preventive medicine for the doctor in his community : an epidemiologic approach
McGraw-Hill, 1958
 Buku Teks
Hulley, Stephen
Designing clinical research
Lippincott Williams & Wilkins, 2007
 Buku Teks
Freedman, M. David
Designing systems with microcomputers: a systematic approach
Prentice-Hall, 1983
 Buku Teks SO
Leavell, Hugh Rodman
Preventive medicine for the doctor in his community : an epidemiologic approach / Hugh Rodman, E. Gurney Clark
McGraw-Hill, 1965
 Buku Teks
Daniels, Joanne M.
Clinical calculations : a unified approach
Delmar Cengage Learning, 2006
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