Limouzy, Pierre
McGraw-Hill Publishing Company, 1990
Buku Teks
Evelyne Amon
McGraw-Hill Companies, 1996
Buku Teks
Bragger, Jeannette D.
Heinle & Heinle Pub, 1992
Buku Teks
Heilenman, L. Kathy.
Harper & Row, [date of publication not identified]
Buku Teks
Ross, Janet, author
Harper & Row , 1965
Buku Teks