Walliman, N. (2018). Research methods: The basics (2nd edition.). Routledge.
Cita Chicago (17th ed.)Walliman, Nicholas. Research Methods: The Basics. 2nd edition. Abingdon, Oxon: Routledge, 2018.
Cita MLA (9th ed.)Walliman, Nicholas. Research Methods: The Basics. 2nd edition. Routledge, 2018.
Atenció: Aquestes cites poden no estar 100% correctes.