Não informado. (1939). Annals of the Rheumatic Diseases. British Medical Association.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Annals of the Rheumatic Diseases. London: British Medical Association, 1939.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Annals of the Rheumatic Diseases. British Medical Association, 1939.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.