APA (7th ed.) Citation

Baddiel, I., Blezard, T., & Sullivan, C. (1999). Extraterrestrials: Investigations into the unexplained (1st edition for the U.S. and Canada.). Barron's Educational Series.

Chicago Style (17th ed.) Citation

Baddiel, Ivor, Tracey Blezard, and Colin Sullivan. Extraterrestrials: Investigations into the Unexplained. 1st edition for the U.S. and Canada. New York: Barron's Educational Series, 1999.

MLA (9th ed.) Citation

Baddiel, Ivor, et al. Extraterrestrials: Investigations into the Unexplained. 1st edition for the U.S. and Canada. Barron's Educational Series, 1999.

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