APA (7th ed.) Citation

Pan American Union, Union of American Republics, & International Union of American Republics. (1910). Bulletin of the Pan American Union. The Union.

Chicago Style (17th ed.) Citation

Pan American Union, Union of American Republics, and International Union of American Republics. Bulletin of the Pan American Union. Washington, D.C.: The Union, 1910.

MLA (9th ed.) Citation

Pan American Union, et al. Bulletin of the Pan American Union. The Union, 1910.