Halpern, Siegmund
Prentice Hall of India, 1979
Buku Teks
Jacobalis, Samsi, author
PERSI , 1989
Buku Teks
Chestnut, Bill, author
Addison-Wesley Longman, 1997
Buku Teks
World Health Organization
World Health Organization, 1993
Buku Teks
Ir. John P. Kaunang, author
1987
UI - Skripsi (Membership)