Firestein, G. S., & Kelley, W. N. (2013). Kelley's textbook of rheumatology (9th ed.). Elsevier/Saunders.
Lua i Stíl Chicago (17ú heag.)Firestein, Gary S., agus William N. Kelley. Kelley's Textbook of Rheumatology. 9th ed. Philadelphia, PA: Elsevier/Saunders, 2013.
Lua MLA (9ú heag.)Firestein, Gary S., agus William N. Kelley. Kelley's Textbook of Rheumatology. 9th ed. Elsevier/Saunders, 2013.
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