Marcos, F. E. (1967). Extemporaneous speech at the Annual Seminar of the Philippine Historical Association, FEU, 29 November 1967.
Čikaški stil citiranja (17. izdanje)Marcos, Ferdinand E. Extemporaneous Speech at the Annual Seminar of the Philippine Historical Association, FEU, 29 November 1967. 1967.
MLA način citiranja (9. izdanje)Marcos, Ferdinand E. Extemporaneous Speech at the Annual Seminar of the Philippine Historical Association, FEU, 29 November 1967. 1967.
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