Barnard, Alan, author
Cambridge University Press, 2000
Buku Teks
edited by Elvio Angeloni
McGraw-Hill, 2012
Buku Teks
Lindholm, Charles, author
McGraw-Hill, 2001
Buku Teks
Garbarino, Merwyn
Holt, Rinehart and Winston, 1977
Buku Teks
Eriksen, Thomas Hylland, author
Pluto Press, 2001
Buku Teks