APA (7th ed.) Citation

Não informado. (1939). Quarterly Bulletin on Solar Activity. International Astronomical Union.

Chicago Style (17th ed.) Citation

Não informado. Quarterly Bulletin on Solar Activity. Zurich, Suíça: International Astronomical Union, 1939.

MLA (8th ed.) Citation

Não informado. Quarterly Bulletin on Solar Activity. International Astronomical Union, 1939.

Warning: These citations may not always be 100% accurate.