Gould, Alan, author
Angus & Robertson , 1986
Buku Teks
Higgins, Jack
A Signet Book, 1985
Buku Teks
Billington, Michael, author
Macmillan, 1990
Buku Teks
Denny Andres, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1996
UI - Skripsi (Membership)
Unwin, Tim, author
Longman Scientific & Technical, 1992
Buku Teks