APA (7th ed.) Citation

Punzalan, P., & Groyon, V. G. (2007). On usefulness and the passage of time. Milflores Pub.

Chicago Style (17th ed.) Citation

Punzalan, Pam, and Vicente Garcia Groyon. On Usefulness and the Passage of Time. Quezon City: Milflores Pub, 2007.

MLA (9th ed.) Citation

Punzalan, Pam, and Vicente Garcia Groyon. On Usefulness and the Passage of Time. Milflores Pub, 2007.