Elsbree, Langdon
Health and Comp, 1967
Buku Teks
Hodges, John C.
Harcourt, Brace & World, 1962
Buku Teks
Hodges, John C.
Harcourt Brace Jovanovich, 1972
Buku Teks
Heffernan, James A. W.
W.W. Norton & Company, 1990
Buku Referensi
Marius, Richard
McGraw-Hill, 1988
Buku Referensi