edited by Richard L. Cherry, Robert J. Conley and Bernard A. Hirsch
Houghton Mifflin, 1974
Buku Teks SO
Robins, Kevin
Routledge, 1996
Buku Teks SO
Thompson, Evan
Routledge, 1995
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Arnheim, Rudolf
University of California Press, 1957
Buku Referensi
Hobbs, Jack A.
Harcourt Brace Jovanovich, 1980
Buku Teks SO