New York, N.Y. The Board 1971,
Buku Teks
Koestenbaum, Peter
Jossey-Bass Publishers, 1991
Buku Teks
Burns, James McGregor, author
Harper and Row, 1978
Buku Teks
edited by George Gerbner, Richard B. Byrne
John Wiley & Sons, 1981
Buku Teks
Russel, Fox Hon, author
Covendish Publishing Limited, 2000
Buku Teks