Duke, James A.
CRC Press, Taylor & Francis Group, 2009
Buku Referensi
Bold, Harold Charles, 1909-
Harper & Row, 1987
Buku Teks
Jacobs, William P.
Cambridge University Press , 1979
Buku Teks
by Michael G. Barbour ... [and others]
An Imprint of Addison Wesley Longman , 1998
Buku Teks
edited by Hugh Synge
John Wiley & Sons, 1981
Buku Teks