Roethlisberger, F.J.,
Aksara Baru, [1941]
Buku Teks
Pickle, Hal. B.
John Wiley & Sons, 1984
Buku Teks
Given, William B.
Harper & Brothers Publishers, 1949
Buku Teks
M.K. Rustomji, translator
Pustaka Binaman Pressindo, 1994
Buku Teks
Robbins, Stephen P., author
Prentice-Hall, 1997
Buku Teks