APA引文

Field, R. M. (1936). Natural resources of the United States: A basics for economic Geography. New York: Barnes and Noble.

Trích dẫn kiểu Chicago

Field, Richard M. Natural Resources of the United States: A Basics for Economic Geography. New York: Barnes and Noble, 1936.

MLA引文

Field, Richard M. Natural Resources of the United States: A Basics for Economic Geography. New York: Barnes and Noble, 1936.

警告：這些引文格式不一定是100％准確.