edited by L. Andries van der Ark
Lawrence Erlbaum Associates, 2005
Buku Teks
Shavelson, Richard J., author
Allyn and Bacon , 1988
Buku Teks
Erickson, Bonnie H., author
Open University Press, 1977
Buku Teks
Gravetter, Frederick J., author
Wadsworth and Cengage Learning, 2009
Buku Teks
Hinkle, Dennis E., author
Houghton Mifflin, 2003
Buku Teks