Watson, Richard A., author
Harcourt, Brace and World, 1969
Buku Teks
edited by Mari Pritchard Parker, Elvio Angeloni
McGraw-Hill, 2013
Buku Teks
Getis, Arthur, author
Macmillan, 1985
Buku Teks
Sobo, Elisa J., author
Routledge, 2016
Buku Teks
Sutton, Mark Q., author
Routledge, 2016
Buku Teks