APA ציטוט

Sauvy, J., & Sauvy, S. (1974). The child's discovery of space. Penguin Educaction.

Chicago Style (17th ed.) Citation

Sauvy, Jean, and Simonne Sauvy. The Child's Discovery of Space. Harmondsworth, Eng.: Penguin Educaction, 1974.

ציטוט MLA

Sauvy, Jean, and Simonne Sauvy. The Child's Discovery of Space. Penguin Educaction, 1974.