Gaya APA

WEST, S, G., KOLFENBACH, J. (2020). (E) RHEUMATOLOGY (ed 4). United States of America: ELSEVIER.

Gaya MLA

WEST, STERLING, G.., KOLFENBACH, JASON. "(E) RHEUMATOLOGY". ed 4 United States of America: ELSEVIER, 2020. Text.