Martin, Joanne
SAGE Publications, Inc, 2002
Buku Teks
Schein, Edgar H.
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Buku Teks
edited by Kwesi Owusu
Routledge , 2000
Buku Teks
edited by Laura Nader
Aldine, 1969
Buku Teks
edited by Laura Nader
Berkeley University of California , 1997
Buku Teks