APA (7th ed.) Citation

Filipowicz-Sosnowska, A., & Przygodzka, M. Early rheumatoid arthritis (ERA): Difficulty in diagnosis.

Chicago Style (17th ed.) Citation

Filipowicz-Sosnowska, A., and M. Przygodzka. Early Rheumatoid Arthritis (ERA): Difficulty in Diagnosis.

MLA (9th ed.) Citation

Filipowicz-Sosnowska, A., and M. Przygodzka. Early Rheumatoid Arthritis (ERA): Difficulty in Diagnosis.

Warning: These citations may not always be 100% accurate.