Gans, Herbert J., author
The Free Press, 1962
Buku Teks
edited by by Van Nguyen-Marshall, Lisa B. Welch Drummond, Daniele Belanger
Springer, 2012
eBooks
Cousins, Albert N., 1919-, author
John Wiley & Sons, 1979
Buku Teks
Karp, David A., author
Praeger, 2015
Buku Teks
Mitchell, William J., author
MIT Press , 2000
Buku Teks