Theobald, G. H. (1963). Methods and mechanies for tile and other tube drainage. Food and Agriculture Organization.
Chicago Style aipamenaTheobald, G H. Methods and Mechanies for Tile and Other Tube Drainage. U S A: Food and Agriculture Organization, 1963.
MLA aipamenaTheobald, G H. Methods and Mechanies for Tile and Other Tube Drainage. Food and Agriculture Organization, 1963.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.