editor, Nairn H.F. Wilson
Quintessence Books, 2007
Buku Teks SO
Axelsson, Per
Quintessence Publishing, 2009
Buku Referensi
Banerjee, Avijit
Oxford University Press, 2015
Buku Teks SO
Artikel Jurnal
Kohli, Ravinder Kumar, Shibu Jose, Harminder Pal Singh, Daizy Rani Batish, editor
CRC Press, Taylor & Francis Group, 2009
Buku Teks SO