Fleming, C.M.
Routledge and Kegan Paul, 1955
Buku Teks
Santrock, John W.
McGraw-Hill Education, 2019
Buku Teks
Santrock, John W.
McGraw-Hil , 2005
Buku Teks
Santrock, John W.
University of Texas, 1990
Buku Teks
Santrock, John W.
McGraw-Hill, 2012
Buku Teks