APA (7th ed.) Citation

Dominion Observatory (Ottawa). Publications of the Dominion Observatory, Ottawa. Duhamel.

Chicago Style (17th ed.) Citation

Dominion Observatory (Ottawa). Publications of the Dominion Observatory, Ottawa. Ottawa: Duhamel.

MLA (9th ed.) Citation

Dominion Observatory (Ottawa). Publications of the Dominion Observatory, Ottawa. Duhamel.

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