Koestenbaum, Peter
Jossey-Bass Publishers, 1991
Buku Teks
Harper and Brothers, 1959
Buku Teks
Macleride, Sean, author
Balai Pustaka, 1983
Buku Teks
Haynes, W. Warren (William Warren), 1921-1972, author
PRENTOCE-HALL, Inc, Englewood Clifts, 1969
Buku Teks
Fitagerald, Hiram E
0, 1982
Buku Teks