Cozby, Paul C.
Methods in behavioral research
McGraw-Hill, Higher Education, 2008
 Buku Teks
Gravetter, Frederick J.
Research methods for the behavioral sciences
Wadsworth, 2012
 Buku Teks
Cozby, Paul C.
Methods in behavioral research
McGraw-Hill, 2012
 Buku Teks
Gravetter, Frederick J.
Research methods for the behavioral sciences
CT Cengage Learning, 2016
 Buku Teks
Gravetter, Frederick J.
Research methods for the behavioral sciences
Cengage, 2018
 Buku Teks