Florence, P. Sargant
G.A. Watts , 1964
Buku Teks
Ruth Rama, editor
The Haworth Press, 2008
Buku Referensi
Tipping, Richard
University of Queensland Press , 1972
Buku Teks
Winter, Léon de, 1954-, author
De Bezige Bij, 1996
Buku Teks
Feynman, Richard P.
Addison-Wesley Pub. Co., 1963
Buku Teks