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Prentice-Hall, 1990
Buku Teks
Kruglinski, David, author
Osborne McGraw-Hill, 1986
Buku Teks
Rr. Nugraheni Widia Utami, author
Universitas Indonesia, 2012
UI - Skripsi (Membership)
Porter, Kent, author
Prentice-Hall, 1987
Buku Teks
Universitas Indonesia, 2006
UI - Skripsi (Membership)