Marzollo, J., & Wick, W. (2001). I spy, year-round challenger!: A book of picture riddles. Scholastic.
Cita Chicago Style (17a ed.)Marzollo, Jean, y Walter Wick. I Spy, Year-round Challenger!: A Book of Picture Riddles. New York: Scholastic, 2001.
Cita MLA (8a ed.)Marzollo, Jean, y Walter Wick. I Spy, Year-round Challenger!: A Book of Picture Riddles. Scholastic, 2001.
Precaución: Estas citas no son 100% exactas.