Cita APA (7th ed.)
Boyd, D. R. (2006). Lifespan development (4th ed.). Pearson.
Cita Chicago (17th ed.)
Boyd, Denise Roberts. Lifespan Development. 4th ed. Boston: Pearson, 2006.
Cita MLA (9th ed.)
Boyd, Denise Roberts. Lifespan Development. 4th ed. Pearson, 2006.
Atenció: Aquestes cites poden no estar 100% correctes.