APA (7th ed.) Citation

Lang, O. F., Fior, J., & Tregear, M. (1980). The light of day. Collins.

Chicago Style (17th ed.) Citation

Lang, Othmar Franz, Jane Fior, and Margaret Tregear. The Light of Day. London [etc.]: Collins, 1980.

MLA (8th ed.) Citation

Lang, Othmar Franz, et al. The Light of Day. Collins, 1980.