Baumann, P. (1970). Collecting antique Marbles. Mid-America Book Company.
Cita Chicago Style (17a ed.)Baumann, Paul. Collecting Antique Marbles. Leon: Mid-America Book Company, 1970.
Cita MLA (8a ed.)Baumann, Paul. Collecting Antique Marbles. Mid-America Book Company, 1970.
Precaución: Estas citas no son 100% exactas.