Ott, J. Steven, author
Wadsworth and Cengage Learning, 2011
Buku Teks
Pugh, Derek S., author
[Publisher not identified], [Date of publication not identified]
Buku Teks
edited by Huxley Madeheim, Edward Mark Mazze and Charles S. Stein
Holt, Rinehart and Winston, 1963
Buku Teks
edited by Ralph M. Kramer and Harry Specht
Prentice-Hall, 1969
Buku Teks
edited by Ralph M. Kramer, Harry Specht
Prentice-Hall, 1983
Buku Teks