APA (7th ed.) Citation

Roy, A. L. (1941). El quincuagésimo aniversario de la Encíclica Rerum Novarum. International Labour Organization.

Chicago Style (17th ed.) Citation

Roy, Albert Le. El Quincuagésimo Aniversario De La Encíclica Rerum Novarum. International Labour Organization, 1941.

MLA (9th ed.) Citation

Roy, Albert Le. El Quincuagésimo Aniversario De La Encíclica Rerum Novarum. International Labour Organization, 1941.

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