edited by Peter Melville Logan; associate editors, Olakunle George, Susan Hrgeman, Efrain Kristal
Wiley-Blackwell, 2011
Buku Referensi
Umar Junus
Universiti Malaya, 1974
Buku Teks
editor, Ronald Hamowy
Sage Publications, 2008
Buku Referensi
Sloane, Thomas O.
Oxford University Press, 2001
Buku Referensi
Americana Corporation, 1980
Buku Referensi