Cita APA

Billings, B. R. (1941). Nitrous Oxide for Dental Anaesthesia.

Chicago Style Citation

Billings, B. Richardson. Nitrous Oxide for Dental Anaesthesia. 1941.

Cita MLA

Billings, B. Richardson. Nitrous Oxide for Dental Anaesthesia. 1941.

Atenció: Aquestes cites poden no estar 100% correctes.