Hicks, Lanis L.
Jones & Bartlett Learning, 2014
Buku Teks
edited by Julian L. Simon and Julie Da Vanzo
JAI Press, 1980
Buku Teks
edited by W.L. Gibson, Jr, R.J. Hildreth, Gene Wunderlich
University of Nebraska Press, 1966
Buku Teks
Armitage, P.
Blackwell Scientific Publication, 1985
Buku Teks
Osborn, John F.
Blackwell, 1979
Buku Teks