APA (7th ed.) Citation

Harris, P., Hastings, A., Horgan, J., & Keane, L. (1968). On human life: A examination of "Humanae Vitae". Burns & Oates.

Chicago Style (17th ed.) Citation

Harris, Peter, Adrian Hastings, John Horgan, and Lionel Keane. On Human Life: A Examination of "Humanae Vitae". London: Burns & Oates, 1968.

MLA (9th ed.) Citation

Harris, Peter, et al. On Human Life: A Examination of "Humanae Vitae". Burns & Oates, 1968.