Innes, Judith E., author
Routledge, 2010
Buku Teks
Johnson, James A., author
Delmar Cengage Learning, 2013
Buku Teks
Thomson, William J., author
Prentice-Hall, 2000
Buku Teks
Dedi Priadi, author
Universitas Indonesia, 1997
Prosiding
edited with an introd. by Arthur M. Okun
W.W. Norton, 1965
Buku Teks