Παραπομπή APA

Healey, J. F. (1999). Statistics: Tool for social research (5.). Wadsworth publishing company.

Παραπομπή Chicago Style

Healey, Joseph F. Statistics: Tool for Social Research. 5. London: Wadsworth publishing company, 1999.

Παραπομπή MLA

Healey, Joseph F. Statistics: Tool for Social Research. 5. Wadsworth publishing company, 1999.