London, J., & Remkiewicz, F. (2003). Froggy's baby sister. Viking.
Cita Chicago (17th ed.)London, Jonathan, i Frank Remkiewicz. Froggy's Baby Sister. New York, N.Y.: Viking, 2003.
Cita MLA (8th ed.)London, Jonathan, i Frank Remkiewicz. Froggy's Baby Sister. Viking, 2003.
Atenció: Aquestes cites poden no estar 100% correctes.