APA (7th ed.) Citation

Calvin, J., & Weber, O. (1937). Unterricht in der christlichen Religion = Institutio Christianae religionis. Unterricht in der christlichen Religion = Institutio religionis Christianae.

Chicago Style (17th ed.) Citation

Calvin, Jean, and Otto Weber. "Unterricht in Der Christlichen Religion = Institutio Christianae Religionis." Unterricht in Der Christlichen Religion = Institutio Religionis Christianae 1937.

MLA (9th ed.) Citation

Calvin, Jean, and Otto Weber. "Unterricht in Der Christlichen Religion = Institutio Christianae Religionis." Unterricht in Der Christlichen Religion = Institutio Religionis Christianae, 1937.

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