Cita APA (7a ed.)

Healey Joseph F. (2012). Statistics a tool for Social Research (9th.). Cengage Learning.

Cita Chicago Style (17a ed.)

Healey Joseph F. Statistics a Tool for Social Research. 9th. UK: Cengage Learning, 2012.

Cita MLA (9a ed.)

Healey Joseph F. Statistics a Tool for Social Research. 9th. Cengage Learning, 2012.