Citazione Stile APA (7a Edizione)

Welch, T. L. (1989). The Organization of American States and Its Documentation.

Citazione stile Chigago Style (17a edizione)

Welch, Thomas L. The Organization of American States and Its Documentation. 1989.

Citatione MLA (9a ed.)

Welch, Thomas L. The Organization of American States and Its Documentation. 1989.