Cita APA (7th ed.)

Mitchell, M. L., & Jolley, J. M. (2013). Research design explained (8th ed.). Wadsworth Cengage Learning.

Cita Chicago (17th ed.)

Mitchell, Mark L., i Janina M. Jolley. Research Design Explained. 8th ed. Australia: Wadsworth Cengage Learning, 2013.

Cita MLA (9th ed.)

Mitchell, Mark L., i Janina M. Jolley. Research Design Explained. 8th ed. Wadsworth Cengage Learning, 2013.