Cita APA (7th ed.)

Coronet Film. (1993). Aquatic ecosystem: Freshwater. Coronet Film & Video.

Cita Chicago (17th ed.)

Coronet Film. Aquatic Ecosystem: Freshwater. [Placed of publication not identified]: Coronet Film & Video, 1993.

Cita MLA (9th ed.)

Coronet Film. Aquatic Ecosystem: Freshwater. Coronet Film & Video, 1993.