Cita APA

Marshak, S., & Stephen Marshak. Earth: Portrait of a planet. New York: W. W. Norton.

Chicago Style Citation

Marshak, Stephen, i Stephen Marshak. Earth: Portrait of a Planet. New York: W. W. Norton.

Cita MLA

Marshak, Stephen, i Stephen Marshak. Earth: Portrait of a Planet. New York: W. W. Norton.

Atenció: Aquestes cites poden no estar 100% correctes.