Cita APA (7th ed.)

Coronel, H. R. (1974). A comparative study of English and Spanish sounds and letter forms [microform]. Photoduplication Service, University of the Philippines Library.

Cita Chicago (17th ed.)

Coronel, Hermogenes R. A Comparative Study of English and Spanish Sounds and Letter Forms [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1974.

Cita MLA (9th ed.)

Coronel, Hermogenes R. A Comparative Study of English and Spanish Sounds and Letter Forms [microform]. Photoduplication Service, University of the Philippines Library, 1974.