Fletcher, Robert H.
Clinical epidemiology : the essentials
Williams & Wilkins, 1996
 Buku Teks
Fletcher, Robert H.
Sari epidemiologi klinik = Clinical epidemiology: the essentials
Gajah Mada University Press , 1991
 Buku Teks
Fletcher, Robert H.
Sari epidemiologi klinik = Clinical epidemiology : the essentials
Gadjah Mada University Press, 1992
 Buku Teks
Fletcher, Robert H.
Clinical epidemiology : the essentials / Robert H. Fletcher, Suzanne W. Fletcher, Grant S. Fletcher
Lippincott Williams &​ Wilkins, 1996
 Buku Teks
Hulley, Stephen
Designing clinical research
Lippincott Williams & Wilkins, 2007
 Buku Teks