edited by Robert W. Tucker, Charles B. Keely and Linda Wrigley
Westview Press, 1992
Buku Teks
Meade, Teresa A., author
Wiley-Blackwell, 2010
Buku Teks
Anabella Davila
Routledge, Taylor & Francis Group, 2009
Buku Teks
Duke, James A., author
CRC Press, Taylor & Francis Group, 2009
Buku Referensi
St.Martin`s Press, 1971
Buku Teks