by Stephen Barrett, William M. London, Manfred Kroger, Harriet Hall, Robert S. Baratz
McGraw-Hill, 2013
Buku Teks
Bellow, Saul
Random House, 1995
Buku Teks
London, London Longmans
Buku Referensi
Adler, Mortimer Jerome, 1902-2001
iPublishing, 2007
Buku Teks
Nelson, James G.
Twayne, 1966
Buku Teks