Lorenz, Konrad Z
Time Incorporated, 1962
Buku Teks
Alcock, John, author
Sinauer Associates, 1989
Buku Teks
McFarland, David, author
Longman, 1993
Buku Teks
Marler, Peter, author
John Wiley & Sons, 1966
Buku Teks
Ridley, Mark, author
Blackwell, 1995
Buku Teks