ed. by Igor J. Karassik [and others]
McGraw-Hill, 2001
Buku Referensi
Tresidder, Megan
Yogyakarta : lotus, 2003,
Buku Teks
editor, Don C. Locke, Jane E. Myers, Edwin L. Herr
Sage, 2001
Buku Referensi
edited by Gary R. McClain
McGraw-Hill, 1993
Buku Referensi
Cawkell, Tony
Routledge, 1996
Buku Referensi