edited by Richard G. Schroeder, Levis D. McCullers and Myrtle Clark
John Wiley & Sons, 1987
Buku Teks
Nemmers, Erwin Esser, author
McGraw-Hill, 1966
Buku Teks
Boyd, Harper W., Jr., author
Richard D. Irwin, 1977
Buku Teks
Boyd, Harper W., Jr., author
Richard D. Irwin, 1956
Buku Teks
Broom, Leonard
Harper & Row , 1973
Buku Teks