America Explored : : a Cartographical history of the exploration of North America.

MLA

Johnson, Adrian. America Explored : a Cartographical History of the Exploration of North America. New York City: The Viking Press, 1974.

APA

Johnson, A. (1974). America Explored : a Cartographical history of the exploration of North America. New York City: The Viking Press.

Chicago

Johnson, Adrian America Explored: A Cartographical History of the Exploration of North America. New York City: The Viking Press, 1974.