Helen Jaspan, author
Gunung Agung, 1961
Buku Teks
Universitas Indonesia, 1998
UI - Skripsi (Membership)
Fook, Janis
Allen & Unwin, 1993
Buku Teks
edited by Robert W. Roberts, Robert H. Nee
University of Chicago Press, 1970
Buku Teks
Hollis, Florence, author
Random House, 1968
Buku Teks