APA (7th ed.) Citation

Greg, W. W. (1927). The calculus of variants: An essay on textual criticism. Clarendon.

Chicago Style (17th ed.) Citation

Greg, W. W. The Calculus of Variants: An Essay on Textual Criticism. Oxford: Clarendon, 1927.

MLA (9th ed.) Citation

Greg, W. W. The Calculus of Variants: An Essay on Textual Criticism. Clarendon, 1927.

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