Shapiro, Alan C.
Allyn and Bacon, 1986
Buku Teks
Abdullah, Fuad A.
Prentice-Hall International, 1987
Buku Teks
Shapiro, Alan C.
[Publisher not identified], [Date of publication not identified]
Buku Teks
Block, Stanley B.
Irwin, 1994
Buku Teks
Block, Stanley B.
McGraw-Hill, 2002
Buku Teks