Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.