Kurnow, Ernest, author
Richard D. Irwin, 1969
Buku Teks
Lapin, Lawrence L., author
Harcourt Brace Jovanovich, 1978
Buku Teks
Olson, Charles L., author
Scott, Foresman, 1983
Buku Teks
Kazmier, Leonard J., author
McGraw-Hill, 2004
Buku Teks
Freund, John E., author
Prentice-Hall, 1974
Buku Teks