Ebbing, Darrell D.
Houghton Miffiln, 1987
Buku Teks
Garret, Alfred B., author
Blaisdell, 1968
Buku Teks
Vaczek, Louis, author
The Viking Press, 1964
Buku Teks
Silberberg, Martin S., author
McGraw-Hill, 2000
Buku Teks
Brady, James E., author
[publisher not identified], [date of publication not identified]
Buku Teks