APA (7th ed.) Citation

(1931). Doctors' permits to purchase. [publisher not identified].

Chicago Style (17th ed.) Citation

Doctors' Permits to Purchase. Washington, D.C.: [publisher not identified], 1931.

MLA (9th ed.) Citation

Doctors' Permits to Purchase. [publisher not identified], 1931.

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