Cita APA (7a ed.)

Idzikowski, C. (2019). The expert guide to sleeping well (Revised edition.). Watkins.

Cita Chicago Style (17a ed.)

Idzikowski, Christopher. The Expert Guide to Sleeping Well. Revised edition. London: Watkins, 2019.

Cita MLA (9a ed.)

Idzikowski, Christopher. The Expert Guide to Sleeping Well. Revised edition. Watkins, 2019.