APA (7th ed.) Citation

Armamento, V. B. (1999). Origin of "May day" celebration. Philippine Panorama.

Chicago Style (17th ed.) Citation

Armamento, V. Brigoli. "Origin of "May Day" Celebration." Philippine Panorama 1999.

MLA (9th ed.) Citation

Armamento, V. Brigoli. "Origin of "May Day" Celebration." Philippine Panorama, 1999.

Warning: These citations may not always be 100% accurate.