Farley, John E., author
Prentice-Hall, 1987
Buku Teks
edited by Ralph E. Pumphrey and Muriel W. Pumphrey
Columbia University Press, 1961
Buku Teks
Lester, Jessica N., Author
Sage, 2019
Buku Teks
Buku Teks
Perlmutter, Amos, author
Yale University Press, 1981
Buku Teks