Runyon, Richard P., author
Ill. Richard D. Irwin , 1982
Buku Teks
Daniel, Wayne W., author
Houghton Miffiln, 1989
Buku Teks
Shao, Stephen P., author
Charles E. Merrill, 1976
Buku Teks
Freund, John E., author
Prentice-Hall, 1980
Buku Teks
Allen, R.G.D., author
Hutchinson University Library, 1972
Buku Teks