Neukrug, Edward S., author
Brooks/Cole Cengage Learning, 2012
Buku Teks
edited by Helene Jackson
Jason Aronson, 1991
Buku Teks
Trull, Timothy J., 1960-, author
Thomson Wadsworth, 2005
Buku Teks
White, Robert W., author
Wiley, 1981
Buku Teks
O`Hanlon, Bill, author
Routledge , 2011
Buku Teks