edited by Christian P. Potholm and Richard A. Fredland
University Press of America, 1980
Buku Teks
Fordham, Paul
Penguin Books, 1972
Buku Teks SO
Davidson, Basil
Time-Life International, 1967
Buku Teks
Gilchrist, Michael
Dove Communications, 1982
Buku Teks SO
July, Robert W
Charles Scribner's, 1970
Buku Teks