Artikel Jurnal
Ashcraft, Mark H., author
Harper Collins, 1994
Buku Teks
Tomasello, Michael, author
Harvard University Press, 1999
Buku Teks
alih bahasa, P.A. Lestari ; editor, Daniel P. Purba, Yati Sumiharti
Esensi, 2007
Buku Teks
Tri Swasono Hadi, author
2003
UI - Skripsi (Membership)