APA (7th ed.) Citation

Green, P. (1931). The problem of right conduct: A text-book of Christian ethics. Longmans, Green.

Chicago Style (17th ed.) Citation

Green, Peter. The Problem of Right Conduct: A Text-book of Christian Ethics. London: Longmans, Green, 1931.

MLA (9th ed.) Citation

Green, Peter. The Problem of Right Conduct: A Text-book of Christian Ethics. Longmans, Green, 1931.