Walrod, M. R. (1983). Philosophy of normative discourse and persuasion: A study of Gaddang exhortation and argumentation. UMI.
Cita Chicago (17th ed.)Walrod, Michael Ross. Philosophy of Normative Discourse and Persuasion: A Study of Gaddang Exhortation and Argumentation. Ann Arbor, Mich: UMI, 1983.
Cita MLA (9th ed.)Walrod, Michael Ross. Philosophy of Normative Discourse and Persuasion: A Study of Gaddang Exhortation and Argumentation. UMI, 1983.
Atenció: Aquestes cites poden no estar 100% correctes.