Iacone, Salvatore J., author
Macmillan, 1985
Buku Teks
Saunders, Alta Gwinn, author
McGraw-Hill, 1940
Buku Teks
Anderson, Chester Reed, author
McGraw-Hill, 1957
Buku Teks
Weaver, Patricia C., author
Free Press, 1977
Buku Teks
Holt, Rinehart and Winston of Canada, Limited, 1988
Buku Teks