Verkaaik, Oskar
VU University Press, 1994
Buku Teks
Binder, Leonard
University of California Press, 1961
Buku Teks SO
Rashiduzzaman, M.
Ideal Library, 1967
Buku Teks
Wheeler, Jesse H.
Henry Holt , 1960
Buku Teks
St. Leonards Allen and Unwin , 1996
Buku Teks