Helen Jaspan, author
Gunung Agung, 1961
Buku Teks
edited by Howard L. Parad and Roger R. Miller
Family Service Association of America, 1968
Buku Teks
Simons, Ronald L., author
Macmillan, 1985
Buku Teks
Raju Tanzil Aprizan, author
Fakultas Hukum Universitas Indonesia, 2013
UI - Skripsi (Membership)
Healy, Karen, author
Palgrave Macmillan, 2005
Buku Teks