Cita APA (7th ed.)

Walliman, N. (2016). Social research methods: The essentials (2nd edition.). SAGE.

Cita Chicago (17th ed.)

Walliman, Nicholas. Social Research Methods: The Essentials. 2nd edition. Los Angeles: SAGE, 2016.

Cita MLA (9th ed.)

Walliman, Nicholas. Social Research Methods: The Essentials. 2nd edition. SAGE, 2016.