D.H. Mark Publisher, 1969
Buku Teks
Van Nostrand Reinhold , 1997
Buku Teks
Carnevale, Anthony P.
Dept. of Education, Office Educational Research and Improvement , 1994
Buku Teks
Cottle, Thomas J.
The University of Chicago Press, 1977
Buku Teks
Stoff, Sheldon Ptaschevitch, author
Harper & Row , 1969
Buku Teks