Delaet, Debra L., 1968-
Thomson Wadsworth, 2006
Buku Teks
Delaet, Debra L., 1968-
Cengage Learning, 2015
Buku Teks
Mayer, Ann Elizabeth
Westview Press, 1995
Buku Teks
McDougal, Myres S. (Myres Smith), 1906-1998, editor
Yale University Press, 1980
Buku Teks
University press, 1980
Buku Teks