Não informado. (1920). Quarterly Publications of the American Statistical Association. American Statistical Association.
Chicago-viite (17. p.)Não informado. Quarterly Publications of the American Statistical Association. Boston, Mass: American Statistical Association, 1920.
MLA-viite (8. p.)Não informado. Quarterly Publications of the American Statistical Association. American Statistical Association, 1920.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.