Murkoff, H. E., & Mazel, S. (2009). What to expect when you're expecting (Fourth edition.). Simon & Schuster.
Cita Chicago Style (17a ed.)Murkoff, Heidi Eisenberg, y Sharon Mazel. What to Expect When You're Expecting. Fourth edition. London: Simon & Schuster, 2009.
Cita MLA (9a ed.)Murkoff, Heidi Eisenberg, y Sharon Mazel. What to Expect When You're Expecting. Fourth edition. Simon & Schuster, 2009.
Precaución: Estas citas no son 100% exactas.