Philippine Islands. Weather Bureau & Zwack, G. M. (1910). The return of Halley's comet and popular apprehensions. Bureau of Print.
Citação norma ChicagoPhilippine Islands. Weather Bureau and George M. Zwack. The Return of Halley's Comet and Popular Apprehensions. Manila: Bureau of Print, 1910.
Citação norma MLAPhilippine Islands. Weather Bureau and George M. Zwack. The Return of Halley's Comet and Popular Apprehensions. Bureau of Print, 1910.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.