Cita APA (7th ed.)
Skoglund, H. H. (1985). The world seen. Harvest Publications.
Cita Chicago (17th ed.)
Skoglund, Herbert H. The World Seen. Arlington Heights, Illinois: Harvest Publications, 1985.
Cita MLA (9th ed.)
Skoglund, Herbert H. The World Seen. Harvest Publications, 1985.
Atenció: Aquestes cites poden no estar 100% correctes.