Millet, John D.
Columbia Univ. Press , 1952
Buku Teks
edited by Mary Irwin
American Council on Education, 1956
Buku Teks
Porterfield, John D.
Voice American Forum Lecture, [Date of publication not identified]
Buku Teks
Miller, Leonard S.
Carnegic Commision on Higher Education, 1975
Buku Teks SO
Washington U.S. Department of Health, Education, and Welfare 1955
Buku Teks