APA (7th ed.) Zitazioa

Leach, P. Babyhood: Infant development from birth to two years. Penguin Books.

Chicago Style (17th ed.) Zitazioa

Leach, Penelope. Babyhood: Infant Development from Birth to Two Years. Harmondsworth: Penguin Books.

MLA (9th ed.) Zitazioa

Leach, Penelope. Babyhood: Infant Development from Birth to Two Years. Penguin Books.