APA (7th ed.) Citation

Piasecki, V., & Thackeray, A. (1979). You'll need a guardian angel. Norton.

Chicago Style (17th ed.) Citation

Piasecki, Victor, and Alec Thackeray. You'll Need a Guardian Angel. New York: Norton, 1979.

MLA (9th ed.) Citation

Piasecki, Victor, and Alec Thackeray. You'll Need a Guardian Angel. Norton, 1979.