Cita APA (7th ed.)

Sagan, C. (1978). Murmurs of earth = the voyager interstellar record. Random.

Cita Chicago (17th ed.)

Sagan, Carl. Murmurs of Earth = the Voyager Interstellar Record. N.Y: Random, 1978.

Cita MLA (9th ed.)

Sagan, Carl. Murmurs of Earth = the Voyager Interstellar Record. Random, 1978.