Cita APA

Witkop, B. Paul Ehrlich and his magic bullets - revisited. Proceedings of the America Philosophical Society, 540-557.

Citación estilo Chicago

Witkop, Bernhard. "Paul Ehrlich and His Magic Bullets - Revisited." Proceedings of the America Philosophical Society : 540-557.

Cita MLA

Witkop, Bernhard. "Paul Ehrlich and His Magic Bullets - Revisited." Proceedings of the America Philosophical Society, , pp. 540-557.