Young, Arthur, author
Sphere, 1986
Buku Referensi
edited by Jack Pinkowski
CRC Press, 2008
Buku Referensi
edited by Shayne Cox Gad
Wiley-Interscience, 2008
eBooks
American Booksellers Association, 1969
Buku Teks
Gup, Benton E., author
Richard D. Irwin, 1996
Buku Referensi