Marius, Richard, author
McGraw-Hill, 1988
Buku Teks
Hodges, John C., author
Harcourt, Brace & World, 1962
Buku Teks
Hodges, John C., author
Harcourt Brace Jovanovich, 1972
Buku Teks
Heffernan, James A.W., author
W.W. Norton & Company, 1986
Buku Referensi
Asa S. Knowles, editor-in-chief.
McGraw-Hill, 1970
Buku Referensi