APA (7th ed.) Citation

Charles, G. H. (1959). Pocket field guide to nature. Stackpole Co..

Chicago Style (17th ed.) Citation

Charles, Gordon H. Pocket Field Guide to Nature. Harrisburg, Pa.: Stackpole Co., 1959.

MLA (9th ed.) Citation

Charles, Gordon H. Pocket Field Guide to Nature. Stackpole Co., 1959.