Cita APA (7th ed.)

Trio, J. K., Valencia, C., Manacsa, R., & Flor, R. (1990). Friendly grocer: Amidst tough competition. UP College of Engineering.

Cita Chicago (17th ed.)

Trio, John Kenneth, Carlos Valencia, Roberto Manacsa, i Roger Flor. Friendly Grocer: Amidst Tough Competition. Quezon City: UP College of Engineering, 1990.

Cita MLA (9th ed.)

Trio, John Kenneth, et al. Friendly Grocer: Amidst Tough Competition. UP College of Engineering, 1990.