by Clark Kerr ... [et al.]
Oxford University Press, 1964
Buku Teks
Aubrey, Henry G., author
National Planning Association, 1961
Buku Teks
edited by Martin D. Joachim
The Haworth Press, 1993
Buku Teks
Johnston, Bruce F., author
California Stanford University , 1953
Buku Teks
Ward, Barbara, author
W.W. Norton & Company, 1959
Buku Teks