Cita APA (7a ed.)
Opere, C. COVID-19: Physician Treatment Strategies. Smashwords.
Cita estilo Chicago (17a ed.)
Opere, Caxton. COVID-19: Physician Treatment Strategies. Monterey, EUA: Smashwords.
Cita MLA (9a ed.)
Opere, Caxton. COVID-19: Physician Treatment Strategies. Smashwords.
Precaución: Estas citas no son 100% exactas.