Scher, J. (1985). Pregnancy everything you need to know. penguin Books.
Citazione stile Chigago Style (17a edizione)Scher, Jonathan. Pregnancy Everything You Need to Know. Great Britain: penguin Books, 1985.
Citatione MLA (8a ed.)Scher, Jonathan. Pregnancy Everything You Need to Know. penguin Books, 1985.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.