Henkes, K. (2008). Old Bear. Greenwillow Books.
Cita Chicago (17th ed.)Henkes, Kevin. Old Bear. New York: Greenwillow Books, 2008.
Cita MLA (8th ed.)Henkes, Kevin. Old Bear. Greenwillow Books, 2008.
Atenció: Aquestes cites poden no estar 100% correctes.