Hart, Chris, author
Sage Publications, 2007
Buku Teks
Meyers, Alan, 1945-, author
Pearson Education, 2014
Buku Teks
Ferre, John P., author
Charles E. Merrill Pub. Co., 1983
Buku Referensi
Woods, Geraldine, author
Hungry Minds, 2002
Buku Teks
Lester, James D. Sr., 1935-2006, author
Pearson, 2015
Buku Teks