Hally, M. Bernard Dette
Elsevier, 2009
Buku Teks
Ching, Francis D.K., 1943-
John Wiley & Sons, 2003
Buku Teks
Ching, Francis D.K., 1943-
John Wiley & Sons, 2012
Buku Teks
Peterson's the Innovative Leader in College Guides
Peterson's, 1997
Buku Referensi
Ellis, Peter, 1969-
Learning Matters, 2019
Buku Teks