Baumann, P. (1970). Collecting antique Marbles. Mid-America Book Company.
Chicago-Zitierstil (17. Ausg.)Baumann, Paul. Collecting Antique Marbles. Leon: Mid-America Book Company, 1970.
MLA-Zitierstil (8. Ausg.)Baumann, Paul. Collecting Antique Marbles. Mid-America Book Company, 1970.
警告：這些引文格式不一定是100％准確.