HOWARD, C. G. (1965). Law its nature, functions, and limits. Prentice-Hall.
Chicago-viite (17. p.)HOWARD, Charles G. Law Its Nature, Functions, and Limits. Englewood cliffs: Prentice-Hall, 1965.
MLA-viite (9. p.)HOWARD, Charles G. Law Its Nature, Functions, and Limits. Prentice-Hall, 1965.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.