APA

Arnold C. A., . (1947). An introduction to paleobotany. New York: McGraw-Hill.

Chicago

Arnold Chester A, . 1947. An introduction to paleobotany. New York: McGraw-Hill.

Harvard

Arnold C. A., . (1947). An introduction to paleobotany. New York: McGraw-Hill.

MLA

Arnold Chester A, . An introduction to paleobotany. New York: McGraw-Hill. 1947.