Cita APA (7th ed.)
Holt Basic Education Intermediate. Holt, Rinehart and Winston.
Cita Chicago (17th ed.)
Holt Basic Education Intermediate. New York: Holt, Rinehart and Winston.
Cita MLA (9th ed.)
Holt Basic Education Intermediate. Holt, Rinehart and Winston.
Atenció: Aquestes cites poden no estar 100% correctes.