Shannon, G., & Crews, D. (1996). Tomorrow's alphabet. Greenwillow Books.
Cita Chicago Style (17a ed.)Shannon, George, y Donald Crews. Tomorrow's Alphabet. New York: Greenwillow Books, 1996.
Cita MLA (8a ed.)Shannon, George, y Donald Crews. Tomorrow's Alphabet. Greenwillow Books, 1996.
Precaución: Estas citas no son 100% exactas.