APA citiranje

Herrera, D. P. Studies on the fusability of coal ash. Philippine Engineering Journal.

Chicago Style (17th ed.) Citation

Herrera, D.L. Pugal. "Studies on the Fusability of Coal Ash." Philippine Engineering Journal .

MLA citiranje

Herrera, D.L. Pugal. "Studies on the Fusability of Coal Ash." Philippine Engineering Journal, .