(1971). Bibliography of agriculture: Data provided by National Agricultural Library, U.S. Department of Agriculture. CCM Information Corp.
Chicago-Zitierstil (17. Ausg.)Bibliography of Agriculture: Data Provided by National Agricultural Library, U.S. Department of Agriculture. New York, NY: CCM Information Corp, 1971.
MLA-Zitierstil (9. Ausg.)Bibliography of Agriculture: Data Provided by National Agricultural Library, U.S. Department of Agriculture. CCM Information Corp, 1971.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.