Helvering, Commissioner of Internal Revenue, et al. v. Davis. Great Neck Publishing.
Chicago-viite (17. p.)Helvering, Commissioner of Internal Revenue, Et Al. V. Davis. Great Neck Publishing.
MLA-viite (9. p.)Helvering, Commissioner of Internal Revenue, Et Al. V. Davis. Great Neck Publishing.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.