Lua APA (7ú heag.)

Romero, P. P. (1997). Principles of speech and oral communication. Katha.

Lua i Stíl Chicago (17ú heag.)

Romero, Perlita P. Principles of Speech and Oral Communication. Quezon City: Katha, 1997.

Lua MLA (9ú heag.)

Romero, Perlita P. Principles of Speech and Oral Communication. Katha, 1997.

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