edited by Robert R. Bell
Dorsey Press, 1962
Buku Teks
Youngs, Raymond, author
Cavendish, 1994
Buku Teks
Rifkin, Bernard, author
McGraw-Hill, 1979
Buku Teks
edited by Rebecca B. Rubin, Philip Palmgreen and Howard E. Sypher
Lawrence Erlbaum Associates, 2004
Buku Teks
edited by Cyril M. Harris
McGraw-Hill, 1977
Buku Teks