Cita APA (7th ed.)

Dacey, J., & Travers, J. (1991). Human development: Across the lifespan. WCB.

Cita Chicago (17th ed.)

Dacey, John, i John Travers. Human Development: Across the Lifespan. Boulevard: WCB, 1991.

Cita MLA (9th ed.)

Dacey, John, i John Travers. Human Development: Across the Lifespan. WCB, 1991.