Parsons, C. J., author
George Allen and Unwin, 1973
Buku Teks
The University of Hong Kong, 1998
Buku Referensi
Mardiyah, author
Unversitas Indonesia. Fakultas Teknik, 2016
UI - Skripsi (Membership)
Sternberg, David, author
ST. Martin's Press, 1981
Buku Teks
Davis, Gordon B., author
Barron's Educational Series, 1979
Buku Teks