APA-Zitierstil (7. Ausg.)

(1996). Keys to soil taxonomy (7. ed.). Government Printing Office.

Chicago-Zitierstil (17. Ausg.)

Keys to Soil Taxonomy. 7. ed. Washington, DC: Government Printing Office, 1996.

MLA-Zitierstil (9. Ausg.)

Keys to Soil Taxonomy. 7. ed. Government Printing Office, 1996.