Bordens, K. S., & Abbott, B. B. (2011). Research design and methods: A process approach (8th ed.). McGraw-Hill.
Cita Chicago (17th ed.)Bordens, Kenneth S., i Bruce B. Abbott. Research Design and Methods: A Process Approach. 8th ed. New York: McGraw-Hill, 2011.
Cita MLA (9th ed.)Bordens, Kenneth S., i Bruce B. Abbott. Research Design and Methods: A Process Approach. 8th ed. McGraw-Hill, 2011.
Atenció: Aquestes cites poden no estar 100% correctes.