APA (7th ed.) Citation

Hubbard, P., & Letzig, M. (1999). Trick or treat countdown. Holiday House.

Chicago Style (17th ed.) Citation

Hubbard, Patricia, and Michael Letzig. Trick or Treat Countdown. New York: Holiday House, 1999.

MLA (8th ed.) Citation

Hubbard, Patricia, and Michael Letzig. Trick or Treat Countdown. Holiday House, 1999.

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