APA (7th ed.) Citation

Barkley, F. A. (1939). Keys to the phyla of organisms: Including keys to the orders of the plant kingdon. Associated student's store.

Chicago Style (17th ed.) Citation

Barkley, Fred Alexander. Keys to the Phyla of Organisms: Including Keys to the Orders of the Plant Kingdon. Missoula, Mont.: Associated student's store, 1939.

MLA (9th ed.) Citation

Barkley, Fred Alexander. Keys to the Phyla of Organisms: Including Keys to the Orders of the Plant Kingdon. Associated student's store, 1939.