Kowalski, Robert
Elsevier, 1979
Buku Teks
Ogata, Katsuhiko, author
Prentice-Hall, 1994
Buku Teks
edited by Robert J. Sternberg and Peter A. Frensch ; penerjemah, Togi Marolop Pradana Pangaribuan
Lawrence Erlbaum Associates, 1991
Buku Teks
Haley, Jay
Harper & Row, 1978
Buku Teks
Laseau, Paul
John Wiley & Sons, 2001
Buku Teks