Gibbons, G. (2007). Groundhog Day! Holiday House.
Cita Chicago Style (17a ed.)Gibbons, Gail. Groundhog Day! New York: Holiday House, 2007.
Cita MLA (8a ed.)Gibbons, Gail. Groundhog Day! Holiday House, 2007.
Precaución: Estas citas no son 100% exactas.