Shavelson, Richard J.
Allyn and Bacon , 1988
Buku Teks SO
Kiess, Harold O.
Allyn and Bacon, 1989
Buku Teks SO
Edwards, Allen L.
Holt, Rinehart and Winston, 1964
Buku Teks
Gravetter, Frederick J.
Wadsworth, 2012
Buku Teks SO
Gravetter, Frederick J.
CT Cengage Learning, 2016
Buku Teks SO