edited by Michael Stohl and Harry R. Targ
Schenkman Publishing Company, 1982
Buku Teks
Palan, Ronen, author
Pinter, 1999
Buku Teks
Cohn, Theodore H., author
Longman, 2003
Buku Teks
Alexandersson, Gunnar
Joh Wiley & Sons , 1963
Buku Teks
edited by Lorraine Eden
St. Martin's Press, 1993
Buku Teks