edited by Frank B. Murray
University Park Press, 1979
Buku Teks
Bottherill, George, author
Cambridge University Press, 1999
Buku Teks
Elena L. Grigorenko, editor
[Springer;, ], 2012
eBooks
editor by Benjamin B. Wolman
New York : Van Nostrand Reinhold Company, 1977,
Buku Referensi
Santrock, John W., author
McGraw-Hill, 2008
Buku Teks