Bloom, Samuel W.
The Free Press, 1965
Buku Teks
William, Robin M.
Alfred, 1966
Buku Teks
UI-Press, 2007
Buku Teks
Juneman Abraham, author
Universitas Bina Nusantara. Department of Psychology, 2014
Artikel Jurnal
Leavel, Hugh Rodman, author
McGraw-Hill, 1958
Buku Teks