Keenan, Joseph H.
John Wiley & Sons, 1980
Buku Teks
Yahya, S.M., author
Wiley Eastern, 1981
Buku Teks
Lehner, Joseph
Rinehart and Winston, Inc,, 1966
Buku Teks
Schreier, Stefan, author
John Wiley & Sons, 1982
Buku Teks
Levenson, Joseph R.
Harvard University Press, 1953
Buku Teks