Cita APA (7th ed.)
Witte, R. S. (1993). Statistics (4th ed.). Harcourt Brace.
Cita Chicago (17th ed.)
Witte, Robert S. Statistics. 4th ed. San Diego: Harcourt Brace, 1993.
Cita MLA (9th ed.)
Witte, Robert S. Statistics. 4th ed. Harcourt Brace, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.