Nussbaum, Allen, author
Prentice-Hall, 1976
Buku Teks
edited by Frederick C. Allard
McGraw-Hill, 1990
Buku Referensi
edited by Frederick C. Allard
McGraw-Hill, 1989
Buku Referensi
Sears, Francis W. (Francis Weston), 1898-1975, author
Addison-Wesley, 1949
Buku Teks
Freeman, M.H., author
Butterworth, 1990
Buku Teks