APA (7th ed.) Citation

Collingwood, E. F. (1966). The theory of cluster sets. Cambridge University Press.

Chicago Style (17th ed.) Citation

Collingwood, Edward F. The Theory of Cluster Sets. Cambridge: Cambridge University Press, 1966.

MLA (9th ed.) Citation

Collingwood, Edward F. The Theory of Cluster Sets. Cambridge University Press, 1966.