Cita APA (7a ed.)

Sayers, W. C. B. (1958). An introduction to library classification: Theorical, historical and practical with readings, exercises and examination (9.ed.). Crafton.

Cita Chicago Style (17a ed.)

Sayers, William Charles Berwick. An Introduction to Library Classification: Theorical, Historical and Practical with Readings, Exercises and Examination. 9.ed. London: Crafton, 1958.

Cita MLA (9a ed.)

Sayers, William Charles Berwick. An Introduction to Library Classification: Theorical, Historical and Practical with Readings, Exercises and Examination. 9.ed. Crafton, 1958.