Isidro, A. S. (1929). The teaching of economics in the secondary schools. U.P. College of Education.
Čikaški stil citiranja (17. izdanje)Isidro, Antonio Santos. The Teaching of Economics in the Secondary Schools. Manila: U.P. College of Education, 1929.
MLA način citiranja (9. izdanje)Isidro, Antonio Santos. The Teaching of Economics in the Secondary Schools. U.P. College of Education, 1929.
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