APA-Zitierstil (7. Ausg.)

Richards, M. C. (1939). Downy mildew of spinach and its control.

Chicago-Zitierstil (17. Ausg.)

Richards, Mathias C. Downy Mildew of Spinach and Its Control. Ithaca, NY, 1939.

MLA-Zitierstil (9. Ausg.)

Richards, Mathias C. Downy Mildew of Spinach and Its Control. 1939.