McCormack, T.H., author
University Tutonial Press, 1980
Buku Teks
Salem, Lionel
John Wiley & Sons, 1982
Buku Teks
Artikel Jurnal
edited by Michael L. Prunier
CRC Press, Taylor & Francis Group, 2009
Buku Teks
Knapp, Daniel R., author
John Wiley & Sons, 1979
Buku Teks