Crocker, Linda M., author
Holt, Rinehart, and Winston, 1986
Buku Teks
Andi Muhammad Natsir Amal, author
1992
UI - Tesis (Membership)
Beerens, A. C. J.
Hayden Book, 1968
Buku Teks
Ridwan, author
Fakultas Teknik Universitas Indonesia, 2008
UI - Tesis (Open)
Gregory, B. A., author
ELBS, 1977
Buku Teks