Menon, M.S.N
Perspective , 1974
Buku Teks
Sentot E. Oktavianus Adiprawatya, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1995
UI - Skripsi Membership
Norton, Henry K.
Allen & Unwin , [date of publication not identified]
Buku Teks
Li, Chien-Nung
D. Van Nostrand Company, Inc., 1966
Buku Teks
Russel, Bertrand, author
George Allen and Unwin, 1922
Buku Teks