Gibbons, G. (1986). Valentine's Day. Holiday House.
Cita Chicago Style (17a ed.)Gibbons, Gail. Valentine's Day. New York: Holiday House, 1986.
Cita MLA (8a ed.)Gibbons, Gail. Valentine's Day. Holiday House, 1986.
Precaución: Estas citas no son 100% exactas.