APA (7th ed.) Citation

Pannekoek, A. (1961). A history of astronomy. George Allen & Unwin Ltd.

Chicago Style (17th ed.) Citation

Pannekoek, Antonie. A History of Astronomy. London: George Allen & Unwin Ltd, 1961.

MLA (8th ed.) Citation

Pannekoek, Antonie. A History of Astronomy. George Allen & Unwin Ltd, 1961.

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