Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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