United States. Federal Horticultural Board. (1922). Amendment No. 1 to Regulations governing importation of potatoes into U.S. (revised). GPO.
Chicago Style (17th ed.) CitationUnited States. Federal Horticultural Board. Amendment No. 1 to Regulations Governing Importation of Potatoes into U.S. (revised). [Washington]: GPO, 1922.
MLA (9th ed.) CitationUnited States. Federal Horticultural Board. Amendment No. 1 to Regulations Governing Importation of Potatoes into U.S. (revised). GPO, 1922.
Warning: These citations may not always be 100% accurate.