Samuel H. Tirtamihardja, author
1989
UI - Tesis (Membership)
Peck, Roxy., author
Cebgage Learning, 2016
Buku Teks
Popkin, Gary S., author
Mifflin Company, 1981
Buku Teks
Crawford, F. Robert, author
Prentice-Hall, 1973
Buku Teks
Olson, David Louis, author
McGraw-Hill , 2007
Buku Teks