Não informado. (1921). Ceramic Age. Business Communications.
Chicagoスタイル(17版)引用形式Não informado. Ceramic Age. Cleveland, Ohio: Business Communications, 1921.
MLA(8版)引用形式Não informado. Ceramic Age. Business Communications, 1921.
警告: この引用は必ずしも正確ではありません.