Marius, Richard, author
McGraw-Hill, 1988
Buku Teks
Elsbree, Langdon, author
Health and Comp, 1967
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, 1990
Buku Referensi