Zechmeister, Eugene B., author
Thomson/Wadsworth, 2003
Buku Teks
Furr, R. Michael, author
SAGE, 2018
Buku Teks
Furr, R. Michael, author
Sage Publications, 2014
Buku Teks
Nunnally, Jum C., author
McGraw-Hill, 1994
Buku Teks
Schiffman, Susan S., author
Buku Teks