The Prudential Map of Discovery and Exploration, 1000 - 1961. (insets) (First Satellites). North Polar Region. Antarctica. Early Spanish and French ExplorationsThe Prudential Map of Discovery and Exploration, 1000 - 1961

Chicago citation style
General Drafting Company. The Prudential Map of Discovery and Exploration, 1000 - 1961. (insets) (First Satellites). North Polar Region. Antarctica. Early Spanish and French Explorations,The Prudential Map of Discovery and Exploration, 1000 - 1961. 1961. Retrieved from the Digital Public Library of America, https://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~290428~90061987. (Accessed December 13, 2018.)
APA citation style
General Drafting Company, (1961) The Prudential Map of Discovery and Exploration, 1000 - 1961. (insets) (First Satellites). North Polar Region. Antarctica. Early Spanish and French Explorations,The Prudential Map of Discovery and Exploration, 1000 - 1961. Retrieved from the Digital Public Library of America, https://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~290428~90061987
MLA citation style
General Drafting Company. Retrieved from the Digital Public Library of America <https://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~290428~90061987>.
Note: These citations are programmatically generated and may be incomplete.