Cita APA (7a ed.)

Gordon Douglas, R. (1951). Formulary and therapeutic guide. [s.n].

Cita Chicago Style (17a ed.)

Gordon Douglas, R. Formulary and Therapeutic Guide. Estados Unidos: [s.n], 1951.

Cita MLA (8a ed.)

Gordon Douglas, R. Formulary and Therapeutic Guide. [s.n], 1951.