Kettle, E. H. (1932). Observations ON THE PNEUMONOCONIOSES.
Chicago Style aipamenaKettle, E. H. Observations ON THE PNEUMONOCONIOSES. 1932.
MLA aipamenaKettle, E. H. Observations ON THE PNEUMONOCONIOSES. 1932.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.