Não informado. Extension Circular. North Carolina Agricultural Extension Service.
Chicagoスタイル(17版)引用形式Não informado. Extension Circular. West Raleigh, NC: North Carolina Agricultural Extension Service.
MLA(8版)引用形式Não informado. Extension Circular. North Carolina Agricultural Extension Service.
警告: この引用は必ずしも正確ではありません.