Cita APA (7th ed.)
Mitchell, M., & Jolley, J. (1992). Research design explained (2nd ed.). Harcourt Brace.
Cita Chicago (17th ed.)
Mitchell, Mark, i Janina Jolley. Research Design Explained. 2nd ed. Philadelphia: Harcourt Brace, 1992.
Cita MLA (9th ed.)
Mitchell, Mark, i Janina Jolley. Research Design Explained. 2nd ed. Harcourt Brace, 1992.
Atenció: Aquestes cites poden no estar 100% correctes.