Carsrud, Alan L., author
Springer, 2011
eBooks
Cordiner, Ralph J.
McGraw-Hill Book Company, Inc., 1956
Buku Teks
Cole, Jonathan, author
Oxford University Press, 2016
eBooks
Lemert, Charles C.
Southern Illinois University Press, 1979
Buku Teks
Rotterdam University Press, 1974
Buku Teks