Cita APA (7a ed.)

(1973). Classification of some bright f-type stars: With unusual spectra. Observatorio Astronómico.

Cita Chicago Style (17a ed.)

Classification of Some Bright F-type Stars: With Unusual Spectra. La Plata: Observatorio Astronómico, 1973.

Cita MLA (9a ed.)

Classification of Some Bright F-type Stars: With Unusual Spectra. Observatorio Astronómico, 1973.