Libes, Sol, author
Hayden Book, 1975
Buku Teks
Genn, Robert C., author
Prentice-Hall, 1982
Buku Teks
Lee, Samuel C., author
Prentice-Hall India, 1981
Buku Teks
Castellucis, Richard L., author
Reston Publishing, 1981
Buku Teks
Holdsworth, Brian, author
Butterworths, 1982
Buku Teks