Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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