UNAFEI, 1999
Buku Teks
edited by Joanne Naughton
McGraw-Hill, 2013
Buku Teks
Jones, Mark, author
Elsevier, 2012
Buku Teks
edited by William B. Sanders and Howard C. Daudistel
Praeger, 1976
Buku Teks
Viano, Emilio C., author
Nelson-Hall, 1975
Buku Teks