Martin, M., & Dahl, R. (1977). Grain production projections: By county and district, Minnesota, 1980 and 1985. Univ. of Minnesota.
Chicago-Zitierstil (17. Ausg.)Martin, Michael, und Reynold Dahl. Grain Production Projections: By County and District, Minnesota, 1980 and 1985. Saint Paul, Minn: Univ. of Minnesota, 1977.
MLA-Zitierstil (9. Ausg.)Martin, Michael, und Reynold Dahl. Grain Production Projections: By County and District, Minnesota, 1980 and 1985. Univ. of Minnesota, 1977.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.