APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (9:e uppl.)

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