Duchacek, Ivo D., author
Dryden Press, 1971
Buku Teks
Soong Hoom Kil and Chung-in Moon
State University of New York Press, 2001
Buku Teks
Madgwick, P.J., author
Stanley Thornes, 1992
Buku Teks
Aristotles, author
Modern Library, 1943
Buku Teks
Theen, Rolf H.W, author
Prentice-Hall, 2001
Buku Teks