Barcelona, H. M., Concepcion, P. O., De la Cruz, E. M., & Enriquez, L. P. (1972). Speech improvement for more effective communication (First edition.). Conanan Educational Supply.
Čikaški stil citiranja (17. izdanje)Barcelona, Herminia M., Proceso O. Concepcion, Edna M. De la Cruz, i Lina P. Enriquez. Speech Improvement for More Effective Communication. First edition. Manila: Conanan Educational Supply, 1972.
MLA način citiranja (9. izdanje)Barcelona, Herminia M., et al. Speech Improvement for More Effective Communication. First edition. Conanan Educational Supply, 1972.
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