Cummings, Michael R., author
Brooks/Cole, Cengage Learning, 2011
Buku Teks
Montagu, Ashley, 1905-1999, author
The Word Publishing, 1995
Buku Teks
Horwitz, Allan V., author
Oxford University Press, 2016
eBooks
Montagu, Ashley, 1905-1999, author
A Mentor Book, 1960
Buku Teks
Jenkins, John B.
HarperCollins Pub, 1990
Buku Teks