Cita APA (7a ed.)

Vidal, F. (1994). Piaget before Piaget. Harvard University Press.

Cita Chicago Style (17a ed.)

Vidal, Fernando. Piaget Before Piaget. Cambridge, Massachusetts ; London, England: Harvard University Press, 1994.

Cita MLA (9a ed.)

Vidal, Fernando. Piaget Before Piaget. Harvard University Press, 1994.