Gravetter, Frederick J.
Wadsworth/Thomson Learning, 2000
Buku Teks SO
Gravetter, Frederick J.
Wadsworth/Thomson Learning, 2004
Buku Teks SO
Jaccard, James
Wadsworth, 1983
Buku Teks SO
Siegel, Sidney, 1916-1961
McGraw-Hill, 1956
Buku Teks SO
Gravetter, Frederick J.
Wadsworth and Cengage Learning, 2009
Buku Teks SO