APA
U.S. Department of Agriculture, . (1971). United States standards for grades of table grapes (European or Vinifera type). Estados Unidos de América: U.S. Department of Agriculture.
Chicago
U.S. Department of Agriculture, . 1971. United States standards for grades of table grapes (European or Vinifera type). Estados Unidos de América: U.S. Department of Agriculture.
Harvard
U.S. Department of Agriculture, . (1971). United States standards for grades of table grapes (European or Vinifera type). Estados Unidos de América: U.S. Department of Agriculture.
MLA
U.S. Department of Agriculture, . United States standards for grades of table grapes (European or Vinifera type). Estados Unidos de América: U.S. Department of Agriculture. 1971.
