Marent, T., & Jackson, T. (2008). Frog. DK.
Chicago Style aipamenaMarent, Thomas, and Tom Jackson. Frog. New York, N.Y.: DK, 2008.
MLA aipamenaMarent, Thomas, and Tom Jackson. Frog. DK, 2008.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.