Cita APA (7th ed.)

Boyd, D. R., & Bee, H. L. (2006). Lifespan development (Fourth edition.). Pearson.

Cita Chicago (17th ed.)

Boyd, Denise Roberts, i Helen L. Bee. Lifespan Development. Fourth edition. Boston, Mass: Pearson, 2006.

Cita MLA (9th ed.)

Boyd, Denise Roberts, i Helen L. Bee. Lifespan Development. Fourth edition. Pearson, 2006.