Flexner, Abraham
Oxford University Press, 1968
Buku Teks
edited by Monbusho
Maruzen, 1985
Buku Referensi
Tapingkae, Amnuay
Regional Institute of Higher Education and Development, 1974
Buku Teks
O`Leary, John
QS Quacquarelli Symonds Limited, 2010
Buku Referensi
International Associational of university, 1993
Buku Referensi