APA (7th ed.) Citation

Margroff, R. E., & Anthony, P. (1970). The E. S. P. worm. Paperback Library.

Chicago Style (17th ed.) Citation

Margroff, Robert E., and Piers Anthony. The E. S. P. Worm. New York: Paperback Library, 1970.

MLA (8th ed.) Citation

Margroff, Robert E., and Piers Anthony. The E. S. P. Worm. Paperback Library, 1970.