Fieser, James, author
Oxford University Press, 2005
Buku Teks
Royce, James E.
McGraw-Hill, 1961
Buku Teks
The UNESCO Press, 1974
Buku Teks
Rodgers, Beth L., author
Lippincott Williams & Wilkins , 2005
Buku Teks
Cassey, Edward S
The university of California press, 1997
Buku Teks