Não informado. (1981). Fruit outlook and situation. U.S. Department of Agriculture, Economic Research Service.
Chicago-viite (17. p.)Não informado. Fruit Outlook and Situation. Washington: U.S. Department of Agriculture, Economic Research Service, 1981.
MLA-viite (8. p.)Não informado. Fruit Outlook and Situation. U.S. Department of Agriculture, Economic Research Service, 1981.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.