Lothers, John E.
Prentice-Hall, 1965
Buku Teks
editor, Roger L. Brockenbrough, Frederick S. Maerritt
McGraw-Hill, 1994
Buku Referensi
Gorenc, B. (Branko)
New South Wales University Press, 1981
Buku Teks
Parker, Harry
John Wiley & Sons, 1983
Buku Teks
Spiegel, Leonard
Regents, 1993
Buku Teks