Bell, Philip A., author
ABS Catalogue, 1999
Buku Referensi
Pole, Andy, author
Chapman & Hall, 1994
Buku Teks
Hinkle, Dennis E., author
Houghton Mifflin, 2003
Buku Teks
Healey, Joseph F., 1945-, author
Wadsworth, 1996
Buku Teks
Hays, William Lee, 1926-1995, author
Holt, Rinehart and Winston, 1973
Buku Teks