Hakala, M. (1986). Pulmonary manifestations of rheumatoid arthritis: A clinical, immunogenetic, and histological study. University of Oulu.
Chicago-viite (17. p.)Hakala, Markku. Pulmonary Manifestations of Rheumatoid Arthritis: A Clinical, Immunogenetic, and Histological Study. Oulu: University of Oulu, 1986.
MLA-viite (8. p.)Hakala, Markku. Pulmonary Manifestations of Rheumatoid Arthritis: A Clinical, Immunogenetic, and Histological Study. University of Oulu, 1986.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.