Cita APA (7a ed.)

Norris, G. W., & Norris, W. F. (1886). The early history of medicine in Philadelphia. By George W. Norris. [Collins Printing House].

Cita Chicago Style (17a ed.)

Norris, George W., y William Fisher Norris. The Early History of Medicine in Philadelphia. By George W. Norris. Philadelphia: [Collins Printing House], 1886.

Cita MLA (8a ed.)

Norris, George W., y William Fisher Norris. The Early History of Medicine in Philadelphia. By George W. Norris. [Collins Printing House], 1886.