APA

Richardson Elwyn S, . (1969). In the early world. New York: Pantheon Books.

Chicago

Richardson Elwyn S, . 1969. In the early world. New York: Pantheon Books.

Harvard

Richardson Elwyn S, . (1969). In the early world. New York: Pantheon Books.

MLA

Richardson Elwyn S, . In the early world. New York: Pantheon Books. 1969.