White, Theresa L., author
Wadsworth and Cengage Learning, 2013
Buku Teks
McNeill, Patrick, author
Routledge, 1999
Buku Teks
Singer, J. David
Westview Press , 1990
Buku Teks
Cambridge University Press, 1991
Buku Teks
Oxlade, Chris, author
Memphis Belle, 2012
Buku Teks