Beirne, Joseph A.
Prentice-Hall, 1969
Buku Teks SO
M. Furqon I. Hanief
1990
UI - Tesis Membership
Chapman, Robert L.
London Pan Books 1988
Buku Referensi
Schwartz, Urs
Doubleday, 1966
Buku Teks
edited by Donald M. Allen
Grove Press, 1960
Buku Teks SO