Dyfyniad APA

Piaget, J., & Inhelder, B. (1967). The child's conception of space. W. W. Norton.

Dyfyniad Arddull Chicago

Piaget, Jean, and Bärbel Inhelder. The Child's Conception of Space. New York: W. W. Norton, 1967.

Dyfyniad MLA

Piaget, Jean, and Bärbel Inhelder. The Child's Conception of Space. W. W. Norton, 1967.

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