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Buku Teks
editor, Dorothy M. Stewart
Elex Media Komputindo, 1993
Buku Teks
Gianti Amanda, author
Fakultas Psikologi Universitas Indonesia, 2021
UI - Tesis (Membership)
Munro, E.A., author
Ghalia Indonesia, 1985
Buku Teks
Johns, D.T., author
PPM, 2001
Buku Teks