APA (7th ed.) Citation

Sparks, J., & Soper, T. (1987). Penguins. Facts on File Publications.

Chicago Style (17th ed.) Citation

Sparks, John, and Tony Soper. Penguins. New York, N.Y.: Facts on File Publications, 1987.

MLA (9th ed.) Citation

Sparks, John, and Tony Soper. Penguins. Facts on File Publications, 1987.

Warning: These citations may not always be 100% accurate.