Tyler G. Hicks, editor ; S. David Hicks, coordinating editor
McGraw-Hill , 2007
Buku Referensi
Williams, Alan, author
Kaplan Education, 2005
Buku Teks
Ettouney, Mohammed M., author
CRC Pres, 2012
Buku Teks
ReVelle, Charles S., author
Prentice-Hall, 1997
Buku Teks
editor-in-chief, Leonard Church Urquhart
McGraw-Hill, 1959
Buku Referensi