Healey, Joseph F., 1945-
Statistics : a tool for social research
Wadsworth, 1996
 Buku Teks
Healey, Joseph F., 1945-
Statistics : a tool for social research
Cengage Learning, 2015
 Buku Teks
Healey, Joseph F., 1945-
Statistics : a tool for social research
Wadsworth and Cengage Learning, 2012
 Buku Teks
Klugh, Henry E.
Statistics : the essentials for research
John Wiley & Sons, 1974
 Buku Teks
Weiss, Robert S.
Statistics in social research : an introduction
N.Y. Wiley , 1968
 Buku Teks