Gray, D. E. (2013). Doing research in the real world (3rd edition.). Sage Publications.
Cita Chicago (17th ed.)Gray, David E. Doing Research in the Real World. 3rd edition. Thousand Oaks, CA: Sage Publications, 2013.
Cita MLA (8th ed.)Gray, David E. Doing Research in the Real World. 3rd edition. Sage Publications, 2013.
Atenció: Aquestes cites poden no estar 100% correctes.