Colin Lago, editor
McGraw-Hill, 2011
Buku Teks
Coon, Dennis, author
Wadsworth/Thomson Learning, 2006
Buku Teks
Corey, Marianne Schneider, author
Thomson/Brooks/Cole, 2006
Buku Teks
Pickering, Judith, author
Routledge, Taylor & Francis Group, 2008
Buku Teks
Rosenfeld, George W., author
Routledge, Taylor & Francis Group, 2009
Buku Teks