Carroll, J.E., author
Cambridge University Press, 1990
Buku Teks
Surina, Tugomir, author
Holt, Rinehart and Winston, 1964
Buku Teks
Milnes, A.G., author
Van Nostrand Reinhold, 1980
Buku Teks
edited by Lloyd P. Hunter
McGraw-Hill, 1970
Buku Referensi
Romanowitz, H. Alex, author
John Wiley & Sons, 1962
Buku Teks