Hakala, M. (1986). Pulmonary manifestations of rheumatoid arthritis: A clinical, immunogenetic, and histological study. University of Oulu.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHakala, Markku. Pulmonary Manifestations of Rheumatoid Arthritis: A Clinical, Immunogenetic, and Histological Study. Oulu: University of Oulu, 1986.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHakala, Markku. Pulmonary Manifestations of Rheumatoid Arthritis: A Clinical, Immunogenetic, and Histological Study. University of Oulu, 1986.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.