Royce, James E.
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Buku Teks
edited by Robert J. Sternberg
American Psychological Association, 2005
Buku Teks
editor, Cynthia Macdonald and Garaham Macdonald
Blackwell Publishers, Ltd., 1995
Buku Teks
Bottherill, George, author
Cambridge University Press, 1999
Buku Teks
Hart, Joe, author
PT Gramedia Pustaka Utama, 2023
Buku Teks