APA (7th ed.) Citation

Harvard College Observatory. (1946). Harvard College Observatory: The first century : a review of the past and a preview of the future. Harvard College Observatory.

Chicago Style (17th ed.) Citation

Harvard College Observatory. Harvard College Observatory: The First Century : A Review of the Past and a Preview of the Future. Cambridge, Massachusetts: Harvard College Observatory, 1946.

MLA (9th ed.) Citation

Harvard College Observatory. Harvard College Observatory: The First Century : A Review of the Past and a Preview of the Future. Harvard College Observatory, 1946.