edited by Bernard Stonehouse and Christopher M. Perrins
University Park Press, 1979
Buku Teks
edited by J.R. Krebs and N.B. Davies
Blackwell, 1995
Buku Teks
Pianka, Eric R.
Harper & Row , 1988
Buku Teks
McGrath, Robert E.
American Psychological Association, cop, 2011
Buku Teks
Tsischitzis, Dionysios C.
Prentice-Hall, 1982
Buku Teks