Todd, D. J.
Chapman and Hall, 1985
Buku Referensi
DuBridge, Lee A
New York University Press 1962
Buku Teks
Reichert, Jonathan F.
Prentice-Hall, 1991
Buku Teks
Eisenberg, Martin A.
Addison-Wesley, 1980
Buku Teks
Popov, Egor P.
Prentice Hall of India, 1979
Buku Teks