Harvey, Steve, author
Amistad, an imprint of HarperCollinsPublishers, 2014
Buku Teks
Hendrick House, 1955
Buku Teks
edited by Gian-Vittorio Caprara and Guus L. Van Heck
Harvester Wheatsheaf, 1992
Buku Teks
Bandura, Albert
Holt, Rinehart and Winston, 1963
Buku Teks
W.J.S. Poerwadarminta, author
De Bliksem, 1930
Buku Klasik