Baumann, P. (1970). Collecting antique Marbles. Mid-America Book Company.
Chicagoスタイル(17版)引用形式Baumann, Paul. Collecting Antique Marbles. Leon: Mid-America Book Company, 1970.
MLA(8版)引用形式Baumann, Paul. Collecting Antique Marbles. Mid-America Book Company, 1970.
警告: この引用は必ずしも正確ではありません.