Mavroudi, Elizabeth, author
Routledge, 2016
Buku Teks
Ray, James Lee, author
Houghton Mifflin, 1987
Buku Teks
Kaarbo, Juliet, author
Wadsworth, Cengage Learning, 2011
Buku Teks
Wiarda, Howard J., author
Thomson Wadsworth, 2000
Buku Teks
Lipschutz, Ronnie D., author
Routledge, 2005
Buku Teks