Duncan, Chester
Queenston House Publishing, 1975
Buku Teks
Kidd
Cambridge University Press, 1973
Buku Teks
Chard, Chester S.
McGraw-Hill, 1975
Buku Teks
Eagle, Chester
McPhee Gribble/Penguins Books, 1985
Buku Teks
Mann, Richard, author
Gateway Books, 1999
Buku Teks