APA-referens (7:e uppl.)
American Agricultural Economics Association, ebrary, Inc, & Martin, L. R. (1977). Traditional fields of agricultural economics, 1940s to 1970s. Published by the University of Minnesota Press for the American Agricultural Economics Association.
Chicago-referens (17:e uppl.)
American Agricultural Economics Association, Inc ebrary, och Lee R. Martin. Traditional Fields of Agricultural Economics, 1940s to 1970s. Minneapolis: Published by the University of Minnesota Press for the American Agricultural Economics Association, 1977.
MLA-referens (9:e uppl.)
American Agricultural Economics Association, et al. Traditional Fields of Agricultural Economics, 1940s to 1970s. Published by the University of Minnesota Press for the American Agricultural Economics Association, 1977.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.