APA

marshall A., . (1922). Principles of Economics. London: Macmillan & Co.

Chicago

marshall Alfred, . 1922. Principles of Economics. London: Macmillan & Co.

Harvard

marshall A., . (1922). Principles of Economics. London: Macmillan & Co.

MLA

marshall Alfred, . Principles of Economics. London: Macmillan & Co. 1922.