Cita APA

Hansen, H. (1961). The world almanac 19 and book of facts. New York: World Telegram.

Citación estilo Chicago

Hansen, Harry. The World Almanac 19 and Book of Facts. New York: World Telegram, 1961.

Cita MLA

Hansen, Harry. The World Almanac 19 and Book of Facts. New York: World Telegram, 1961.