APA aipamena

(1999). 1997 census of agriculture. [Washington, D.C.]: U.S. Dept. of Agriculture, National Agricultural Statistics Services.

Chicago Style aipamena

1997 Census of Agriculture. [Washington, D.C.]: U.S. Dept. of Agriculture, National Agricultural Statistics Services, 1999.

MLA aipamena

1997 Census of Agriculture. [Washington, D.C.]: U.S. Dept. of Agriculture, National Agricultural Statistics Services, 1999.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.