APA (7th ed.) Citation

Riga, P. J. (1964). A guide to Pacem in terris for students: (with discussion questions). Paulist Press.

Chicago Style (17th ed.) Citation

Riga, Peter J. A Guide to Pacem in Terris for Students: (with Discussion Questions). Glen Rock, N.J.: Paulist Press, 1964.

MLA (9th ed.) Citation

Riga, Peter J. A Guide to Pacem in Terris for Students: (with Discussion Questions). Paulist Press, 1964.