Payne, Robert
Smitmark, 1969
Buku Teks
Ackerman, Robert
Cambridge University Press , 1990
Buku Teks
Glendinning, Miles, author
[RIBA , ], 2008
eBooks
Firestone, Robert W., author
American Psychological Association, 2003
Buku Teks
Birkhauser Verlag, 1972
Buku Teks