Willems, M. (2012). The duckling gets a cookie!? Hyperion Books for Children.
Cita Chicago Style (17a ed.)Willems, Mo. The Duckling Gets a Cookie!? New York: Hyperion Books for Children, 2012.
Cita MLA (8a ed.)Willems, Mo. The Duckling Gets a Cookie!? Hyperion Books for Children, 2012.
Precaución: Estas citas no son 100% exactas.