Não informado. (1952). Arkansas Farm Research. Arkansas Agricultural Experiment Station.
Chicago-referens (17:e uppl.)Não informado. Arkansas Farm Research. Fayetteville, Ark: Arkansas Agricultural Experiment Station, 1952.
MLA-referens (8:e uppl.)Não informado. Arkansas Farm Research. Arkansas Agricultural Experiment Station, 1952.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.