Humphreys, Christmas
Penguin Books, 1985
Buku Referensi
Keown, Damien, 1951-
St. Martin`s Press, 1995
Buku Teks SO
Coomaraswamy, Ananda K.
Philosphical Library, [Date of publication not identified]
Buku Teks
Senzaki, Nyogen
Philosophical Library, 1953
Buku Teks SO
Law, Bimala Churn
Kern Institute, Leiden, 1937
Buku Teks SO