Eastman, P. D. (1958). Sam and the firefly. Beginner Books.
Cita Chicago Style (17a ed.)Eastman, P. D. Sam and the Firefly. New York: Beginner Books, 1958.
Cita MLA (8a ed.)Eastman, P. D. Sam and the Firefly. Beginner Books, 1958.
Precaución: Estas citas no son 100% exactas.