Tivy, Louis
University of Toronto Press, 1972
Buku Teks
Fromm, Erich, author
Harper Collins, 2000
Buku Teks
Berton, Pierre
McClelland and Stewart, 1978
Buku Teks
edited by Mary J. Cronin
Harvard Business School Press , 1996
Buku Teks
Carlson, Richard, 1961-, author
Gramedia Pustaka Utama , 2005
Buku Teks