edited by Harold Sackman, Ronald L. Citrenbaum
Prentice-Hall, 1972
Buku Teks
Muslichah Syukri, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1981
UI - Skripsi (Membership)
edited by T.E. Hall, P.R. Jones, G.B. Preston
Academic Press, 1980
Buku Teks
Edey, Harold C.
Garland Publishing , 1982
Buku Teks
Hayes, James L., author
Amacom , 1983
Buku Teks