Hasty, Ronald W.
Harper & Row, Publishers, 1983
Buku Teks
Levy, Michael, 1950-, author
McGraw-Hill Irwin, 2001
Buku Teks
Buskirk, Richard Hobart, 1927-, author
McGraw-Hill, 1979
Buku Teks
Jay Kandampully, editor
[Springer, ], 2012
eBooks
Hollander, Stanley C., author
Michigan State University , 1960
Buku Teks