Butler, Rick
Doubleday & Company, Inc, 1978
Buku Teks
McRobert, Kenneth
McClelland and stewart, 1976
Buku Teks
Coleman, William D.
University of Taronto Press, 1984
Buku Teks
Meuthuen, 1984
Buku Teks
Arnopoulos, Sheila McLeod
McGill-Queen's University Press, 1984
Buku Teks