APA (7th ed.) Citation

Parker, G. H. (1946). The world expands: Recollections of a zoologist. Harvard university press.

Chicago Style (17th ed.) Citation

Parker, George Howard. The World Expands: Recollections of a Zoologist. Cambridge, Mass.: Harvard university press, 1946.

MLA (9th ed.) Citation

Parker, George Howard. The World Expands: Recollections of a Zoologist. Harvard university press, 1946.