APA (7th ed.) Citation

Guillermo, G. (1968). Thumb-mark. Philippine Collegian.

Chicago Style (17th ed.) Citation

Guillermo, Gelacio. "Thumb-mark." Philippine Collegian 1968.

MLA (9th ed.) Citation

Guillermo, Gelacio. "Thumb-mark." Philippine Collegian, 1968.

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