Salk, L. (1983). Your child's first year. Simon and Schuster.
Cita Chicago (17th ed.)Salk, Lee. Your Child's First Year. Simon and Schuster, 1983.
Cita MLA (9th ed.)Salk, Lee. Your Child's First Year. Simon and Schuster, 1983.
Atenció: Aquestes cites poden no estar 100% correctes.