APA (7th ed.) Citation

Lyttleton, R. A. (1953). The comets and their origin. University Press.

Chicago Style (17th ed.) Citation

Lyttleton, R. A. The Comets and Their Origin. Cambridge: University Press, 1953.

MLA (8th ed.) Citation

Lyttleton, R. A. The Comets and Their Origin. University Press, 1953.

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