McNeill, Patrick
Research methods
Routledge, 1990
 Buku Teks
White, Theresa L.
Research methods
Wadsworth and Cengage Learning, 2013
 Buku Teks
Nichols, Michael P.
Family therapy concepts and methods
Pearson Education, 2014
 Buku Teks
Leavitt, Fred
Research methods for behavioral scientists
C. Brown Publishers , 1991
 Buku Teks SO
Research methods: guidance for postgraduates
edited by Tony Greenfield
Arnold , 1996
 Buku Teks SO