Stein, Guido, author
Emerald, 2018
eBooks
Haley, George T.
Butterworth-Heinemann , 1999
Buku Teks
Simon, Herbert A., author
Harper, 1960
Buku Teks
Gordon, Robert Aaron, author
Berkeley, Cal, University of California Press
Buku Teks
Moss, Geoffrey, author
Cengage Learning, 2012
Buku Teks