APA (7th ed.) Citation

Ryan, W. J. (1958). Price theory. Macmillan [u.a.].

Chicago Style (17th ed.) Citation

Ryan, William J. Price Theory. London [u.a.]: Macmillan [u.a.], 1958.

MLA (9th ed.) Citation

Ryan, William J. Price Theory. Macmillan [u.a.], 1958.