edited by Clifton R. Wharton
Aldine Publishig, 1969
Buku Teks
with a pref. by Robert S. McNamara
The John Hopkins University Press , 1975
Buku Teks
Heady, Earl O., author
Prentice-Hall, 1952
Buku Teks
Nakamura, James I., author
Princeton University Press, 1966
Buku Teks
Booth, Anne, author
Allen and Unwin, 1988
Buku Teks