Cita APA (7th ed.)

Firestein, G. S., & Kelley, W. N. (2013). Kelley's textbook of rheumatology (9th ed.). Elsevier/Saunders.

Cita Chicago (17th ed.)

Firestein, Gary S., i William N. Kelley. Kelley's Textbook of Rheumatology. 9th ed. Philadelphia, PA: Elsevier/Saunders, 2013.

Cita MLA (9th ed.)

Firestein, Gary S., i William N. Kelley. Kelley's Textbook of Rheumatology. 9th ed. Elsevier/Saunders, 2013.