APA (7th ed.) Citation

Ratzinger, J. (1990). Doctrinal document on threats to life proposed. Origins, 20, 755-759.

Chicago Style (17th ed.) Citation

Ratzinger, Joseph. "Doctrinal Document on Threats to Life Proposed." Origins 20 (1990): 755-759.

MLA (8th ed.) Citation

Ratzinger, Joseph. "Doctrinal Document on Threats to Life Proposed." Origins, vol. 20, 1990, pp. 755-759.

Warning: These citations may not always be 100% accurate.