Cita APA (7th ed.)

Jenkins, S., & Page, R. (2011). Time to sleep. Houghton Mifflin.

Cita Chicago (17th ed.)

Jenkins, Steve, i Robin Page. Time to Sleep. Boston: Houghton Mifflin, 2011.

Cita MLA (8th ed.)

Jenkins, Steve, i Robin Page. Time to Sleep. Houghton Mifflin, 2011.