Morgan, Mary S., 1952-2011
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Buku Teks
McGraw-Hill, [date of publication not identified]
Buku Teks
edited by Mona Livholts and Lia Bryant
Routledge, 2017
Buku Teks
Genewa : Departemen of Communication and Public Informasi of the ILO, 2006,
Majalah, Jurnal, Buletin
edited by William F. Butler, Robert A. Kavesh
Prentice-Hall, 1966
Buku Teks