APA (7th ed.) Citation

De Beer, G. (1971). Homology, an unsolved problem. Oxford University Press.

Chicago Style (17th ed.) Citation

De Beer, Gavin. Homology, an Unsolved Problem. London: Oxford University Press, 1971.

MLA (8th ed.) Citation

De Beer, Gavin. Homology, an Unsolved Problem. Oxford University Press, 1971.