Freeman, Ruth B., author
W.B. Saunders , 1969
Buku Teks
Rogers, Peter
FA. Davis, 1977
Buku Teks
Centers for Disease Control and Prevention
Centers for Disease Control and Prevention, 2001
Buku Teks
edited by Fiona Sim, Martin McKee
McGraw-Hill, 2011
Buku Teks
Gardner, Mary Sewall, author
Macmillan, 1963
Buku Teks