Ellis, Dave, author
Wadsworth and Cengage Learning, 2013
Buku Teks
Pauk, Walter, author
Houghton Mifflin, 1984
Buku Teks
Committee on the Student in Higher Education
Hazen Foundation, 1968
Buku Teks
The Committe on the Student in Higher Education, 1968
Buku Teks
edited by John N. Gardner and A. Jerome Jewler
Wadsworth, 1985
Buku Teks