Henkes, K. (2015). Penny and her marble: I can read level 1. Greenwillow Books.
Cita Chicago Style (17a ed.)Henkes, Kevin. Penny and Her Marble: I Can Read Level 1. New York: Greenwillow Books, 2015.
Cita MLA (8a ed.)Henkes, Kevin. Penny and Her Marble: I Can Read Level 1. Greenwillow Books, 2015.
Precaución: Estas citas no son 100% exactas.