Richard Creath, editor
Springer, 2012
eBooks
C.A. Qadar
Pakistan Philosophical Congress, 1965
Buku Teks SO
Charlotta Hillerdal, Johannes Siapkas, editors
Routledge, 2015
Buku Teks
Johnson, Carol, author
Allen and Unwin, 1989
Buku Teks
Zainah Anwar, author
Yayasan Mohamed Noah; Petaling Jaya, Selangor, Malaysia , 2011
Buku Referensi