APA (7th ed.) Citation

Donaldson, J., Allen, J., & Allwright, D. (2006). Doctor Duck. Parragon.

Chicago Style (17th ed.) Citation

Donaldson, Julia, Jonathan Allen, and Deborah Allwright. Doctor Duck. UK: Parragon, 2006.

MLA (9th ed.) Citation

Donaldson, Julia, et al. Doctor Duck. Parragon, 2006.