Borlagdan, P. C. Residue handling and soil disturbance of an inclined time furrow opener. Philippine engineering journal.
Cita Chicago (17th ed.)Borlagdan, Paterno C. "Residue Handling and Soil Disturbance of an Inclined Time Furrow Opener." Philippine Engineering Journal .
Cita MLA (9th ed.)Borlagdan, Paterno C. "Residue Handling and Soil Disturbance of an Inclined Time Furrow Opener." Philippine Engineering Journal, .
Atenció: Aquestes cites poden no estar 100% correctes.