Cita APA (7th ed.)

Mitchell, M. L., & Jolley, J. M. (1996). Research design explained (3rd ed.). Harcourt Brace College Publishers.

Cita Chicago (17th ed.)

Mitchell, Mark L., i Janina M. Jolley. Research Design Explained. 3rd ed. Fort Worth: Harcourt Brace College Publishers, 1996.

Cita MLA (9th ed.)

Mitchell, Mark L., i Janina M. Jolley. Research Design Explained. 3rd ed. Harcourt Brace College Publishers, 1996.