Playground Athletic League (Baltimore, Md.). Official handbook. American Sports Pub. Co.
Chicago-viite (17. p.)Playground Athletic League (Baltimore, Md.). Official Handbook. New York: American Sports Pub. Co.
MLA-viite (8. p.)Playground Athletic League (Baltimore, Md.). Official Handbook. American Sports Pub. Co.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.