Παραπομπή APA

MICHAEL HAMMOND. (2013). Research methods: The key concepts. Routledge.

Παραπομπή Chicago Style

MICHAEL HAMMOND. Research Methods: The Key Concepts. London: Routledge, 2013.

Παραπομπή MLA

MICHAEL HAMMOND. Research Methods: The Key Concepts. Routledge, 2013.