Hakala, M. (1986). Pulmonary manifestations of rheumatoid arthritis: A clinical, immunogenetic, and histological study. University of Oulu.
Chicago-referens (17:e uppl.)Hakala, Markku. Pulmonary Manifestations of Rheumatoid Arthritis: A Clinical, Immunogenetic, and Histological Study. Oulu: University of Oulu, 1986.
MLA-referens (8:e uppl.)Hakala, Markku. Pulmonary Manifestations of Rheumatoid Arthritis: A Clinical, Immunogenetic, and Histological Study. University of Oulu, 1986.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.