Kent, Raymond P.
Rinehart, [date of publication not identified]
Buku Teks
Klise, Eugene
South-Western Publisher, 1959
Buku Teks
Westerfield, Ray B., author
Roland Press , 1947
Buku Teks
Klise, Eugene S.
South-Western Pub.Co., 1972
Buku Teks
Miller, Roger LeRoy, author
McGraw-Hill, 1993
Buku Teks