APA

Arnold C. a., . (1947). An introduction to paleobotany. New York: Mcgraw-Hill Book Company.

Chicago

Arnold Chester a, . 1947. An introduction to paleobotany. New York: Mcgraw-Hill Book Company.

Harvard

Arnold C. a., . (1947). An introduction to paleobotany. New York: Mcgraw-Hill Book Company.

MLA

Arnold Chester a, . An introduction to paleobotany. New York: Mcgraw-Hill Book Company. 1947.