Research methods in the social sciences
edited, Bridget Somekh, Cathy Lewin
Sage Publications , 2005
 Buku Teks SO
Gravetter, Frederick J.
Research methods for the behavioral sciences
Wadsworth, 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
Polgar, Stephen
Introduction to research in the health sciences
Churchill Livingstone, 1988
 Buku Teks