Morrison, Robert Thornton, author
Allyn and Bacon, 1973
Buku Teks
Buku Teks
Smith, Andrew, author
John Wiley & Sons, 2012
Buku Teks
Warbuton, Nigel, author
Routledge, 2004
Buku Teks
Kochanek, Richard F., author
Harcourt Brace Jovanovich, 1990
Buku Teks