APA-referens (7:e uppl.)

Walliman, N. (2022). Research methods: The basics (Third edition.). Routledge.

Chicago-referens (17:e uppl.)

Walliman, Nicholas. Research Methods: The Basics. Third edition. Abingdon, Oxon ; New York, NY: Routledge, 2022.

MLA-referens (9:e uppl.)

Walliman, Nicholas. Research Methods: The Basics. Third edition. Routledge, 2022.