Cita APA (7th ed.)
Discovery Channel (Firma) & Discovery Communications, Inc. (2001). Antiguos astrónomos (Spanish version, level 2.). Discovery Communications.
Cita Chicago (17th ed.)
Discovery Channel (Firma) i Inc Discovery Communications. Antiguos Astrónomos. Spanish version, level 2. [Bethesda, MD]: Discovery Communications, 2001.
Cita MLA (9th ed.)
Discovery Channel (Firma) i Inc Discovery Communications. Antiguos Astrónomos. Spanish version, level 2. Discovery Communications, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.