Cita APA (7th ed.)

Gregorio, E. G. (1993). Port of Pulupandan: Tide model. Philippine Engineering Journal.

Cita Chicago (17th ed.)

Gregorio, Enrico G. "Port of Pulupandan: Tide Model." Philippine Engineering Journal 1993.

Cita MLA (9th ed.)

Gregorio, Enrico G. "Port of Pulupandan: Tide Model." Philippine Engineering Journal, 1993.