Lotz, K. E., & Kleven, E. (1993). Snowsong whistling. Dutton Children's Books.
Cita Chicago Style (17a ed.)Lotz, Karen E., y Elisa Kleven. Snowsong Whistling. New York: Dutton Children's Books, 1993.
Cita MLA (8a ed.)Lotz, Karen E., y Elisa Kleven. Snowsong Whistling. Dutton Children's Books, 1993.
Precaución: Estas citas no son 100% exactas.