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Gramedia Pustaka Utama, 1997
Buku Teks
edited by J. Graham Beaumont
Grange Books, 1989
Buku Referensi
Gardner, Howard, author
Basic Books, 1983
Buku Teks
Marbun, Johannes, author
Fakultas Psikologi Universitas Indonesia, 1997
UI - Tesis Membership
Fifi F. Embut, author
Fakultas Psikologi Universitas Indonesia, 1989
UI - Skripsi Membership