APA aipamena

Playground Athletic League (Baltimore, Md.). Official handbook. American Sports Pub. Co.

Chicago Style aipamena

Playground Athletic League (Baltimore, Md.). Official Handbook. New York: American Sports Pub. Co.

MLA aipamena

Playground Athletic League (Baltimore, Md.). Official Handbook. American Sports Pub. Co.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.