APA (7th ed.) Citation

McGill, G., Seltzer, D., & Birkin, A. (1980). The final conflict, Omen III. Macdonald Futura.

Chicago Style (17th ed.) Citation

McGill, Gordon, David Seltzer, and Andrew Birkin. The Final Conflict, Omen III. London [England]: Macdonald Futura, 1980.

MLA (8th ed.) Citation

McGill, Gordon, et al. The Final Conflict, Omen III. Macdonald Futura, 1980.