Lawrence, Eleanor
John Wiley & Sons, 1989
Buku Teks
Lawrence, Eleanor
Prentice-Hall, 2000
Buku Referensi
Eldredge, Niles, author
Oxford University Press, 1985
Buku Teks
Mayr, Ernst, author
Belknap Press, 1982
Buku Teks
Bertalanffy, Ludwig von
John Wiley & Sons, 1952
Buku Teks