APA (7th ed.) Citation

Powell Mark H. & Westley, S. B. (1993). Erythrina in the new and old worlds. Nitrogen Fixing Tree Association.

Chicago Style (17th ed.) Citation

Powell Mark H. and Sidney B. Westley. Erythrina in the New and Old Worlds. Hawaii, USA: Nitrogen Fixing Tree Association, 1993.

MLA (9th ed.) Citation

Powell Mark H. and Sidney B. Westley. Erythrina in the New and Old Worlds. Nitrogen Fixing Tree Association, 1993.

Warning: These citations may not always be 100% accurate.