APA (7e ed.) Bronvermelding

Healey, J. F. (2012). Statistics: A tool for social research (Ninth edition.). Wadsworth/Cengage Learning.

Chicago (17e ed.) Bronvermelding

Healey, Joseph F. Statistics: A Tool for Social Research. Ninth edition. Australia: Wadsworth/Cengage Learning, 2012.

MLA (9e ed.) Bronvermelding

Healey, Joseph F. Statistics: A Tool for Social Research. Ninth edition. Wadsworth/Cengage Learning, 2012.