APA (7th ed.) Citation

Savage, E. A. (1950). A librarian looks at readers: Observation for book selection and personal service (2d ed.). Library Association.

Chicago Style (17th ed.) Citation

Savage, Ernest Albert. A Librarian Looks at Readers: Observation for Book Selection and Personal Service. 2d ed. [London?]: Library Association, 1950.

MLA (9th ed.) Citation

Savage, Ernest Albert. A Librarian Looks at Readers: Observation for Book Selection and Personal Service. 2d ed. Library Association, 1950.