Reynolds, Frank W.
Macmillan, 1967
Buku Teks
edited by Stephen J. Williams
John Wiley & Sons, 1980
Buku Teks
Porche, Demetrius James
Jones and Bartlett Learning, 2012
Buku Teks
edited by Richard H. Egdahl and Diana Chapman Walsh
Springer-Verlag, 1978
Buku Teks
Ginzberg, Eli, 1911-
Simon and Schuster, 1958
Buku Teks