Hymel, Glenn M., author
Elsevier Mosby, 2006
Buku Teks
Tappan, Frances M.
Appletton & Lange , 1998
Buku Teks
McNeill, Patrick, author
Routledge, 1990
Buku Teks
White, Theresa L., author
Wadsworth and Cengage Learning, 2013
Buku Teks
McNeill, Patrick, author
Routledge, 1999
Buku Teks