Cita APA (7th ed.)
Pickford, G. E. (1942). Studies on the digestive enzymes of spiders. Connecticut Acad.
Cita Chicago (17th ed.)
Pickford, Grace E. Studies on the Digestive Enzymes of Spiders. New Haven: Connecticut Acad, 1942.
Cita MLA (9th ed.)
Pickford, Grace E. Studies on the Digestive Enzymes of Spiders. Connecticut Acad, 1942.
Atenció: Aquestes cites poden no estar 100% correctes.