Cita APA (7a ed.)

Hammond, M., & Wellington, J. J. (2013). Research methods: The key concepts (1st published.). Routledge.

Cita Chicago Style (17a ed.)

Hammond, Michael, y J. J. Wellington. Research Methods: The Key Concepts. 1st published. London [etc.]: Routledge, 2013.

Cita MLA (9a ed.)

Hammond, Michael, y J. J. Wellington. Research Methods: The Key Concepts. 1st published. Routledge, 2013.