Barkan, Steven E., author
Jones and Bartlett, 2011
Buku Teks
edited by Larry J. Siegel
West Publishing, 1990
Buku Teks
Regoli, Robert M., author
Jones and Bartlett Publishers, 2010
Buku Teks
Davis, Frederick T, author
Cambridge University Press, 2019
eBooks
Daudistel, Howard C., author
Holt, Rinehart and Winston, 1979
Buku Teks