Papalia, Diane E.
Boston, 2007
Buku Teks
Hinzen, Heribert
Adult Education, 1982
Buku Teks
Santrock, John W.
Wm. C. Brown Publishers, 1985
Buku Teks
Cavanaugh, John C.
Wadsworth , 2011
Buku Teks
Cavanaugh, John C.
Cengage Learning, cop, 2015
Buku Teks