Bourne, Lyle E., Jr.
Prentice-Hall, 1986
Buku Teks
B. Blackwell,, 1991
Buku Teks
Rumelhart, David E., author
MIT Press, 1986
Buku Teks SO
edited by Hans-Georg Geissler, Stephen W. Link and James T. Townsend
Lawrence Erlbaum Associates, 1991
Buku Teks SO
edited by Hans-Georg Geissler, Stephen W. Link and James T. Townsend
Lawrence Erlbaum Associates, 1991
Buku Teks SO