Berko, Roy M, author
Houghton Miffiln, 2001
Buku Teks
Gudykunst, William B
McGraw-Hill, 1992
Buku Teks
Adler, Ronald B. (Ronald Brian), 1946-, author
McGraw-Hill, 2005
Multimedia
Phillips, Gerald M., author
Macmillan, 1982
Buku Teks
Adler, Ronald B. (Ronald Brian), 1946-, author
McGraw-Hill, 2002
Multimedia