APA (7th ed.) Citation

Lientz, G., Charlton, S. C., Danforth, E. T., Britton, R. H., & Tolkien, J. R. R. (1986). Rescue in Mirkwood. Berkley Books.

Chicago Style (17th ed.) Citation

Lientz, Gerald, S. Coleman Charlton, Elizabeth T. Danforth, R. H. Britton, and J. R. R. Tolkien. Rescue in Mirkwood. New York: Berkley Books, 1986.

MLA (8th ed.) Citation

Lientz, Gerald, et al. Rescue in Mirkwood. Berkley Books, 1986.