Cita APA (7th ed.)
Piaget, J. (1951). The child's conception of the world. Little Adams Quality paperbacks.
Cita Chicago (17th ed.)
Piaget, Jean. The Child's Conception of the World. Maryland: Little Adams Quality paperbacks, 1951.
Cita MLA (9th ed.)
Piaget, Jean. The Child's Conception of the World. Little Adams Quality paperbacks, 1951.
Atenció: Aquestes cites poden no estar 100% correctes.