APA (7th ed.) Citation

Roy, A. L. (1941). The fiftieth anniversary of the Rerum Novarum. International Labour Organization.

Chicago Style (17th ed.) Citation

Roy, Albert Le. The Fiftieth Anniversary of the Rerum Novarum. International Labour Organization, 1941.

MLA (9th ed.) Citation

Roy, Albert Le. The Fiftieth Anniversary of the Rerum Novarum. International Labour Organization, 1941.

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