Shavelson, Richard J.
Allyn and Bacon , 1988
Buku Teks
Edwards, Allen L.
Holt, Rinehart and Winston, 1964
Buku Teks
Gravetter, Frederick J.
CT Cengage Learning, 2016
Buku Teks
Gravetter, Frederick J.
Cengage, 2018
Buku Teks
Gravetter, Frederick J.
Wadsworth, 2012
Buku Teks