Cabrera, M. P. Maintenance in engineering laboratories. Philippine Engineering Journal.
Cita Chicago (17th ed.)Cabrera, Macario P. "Maintenance in Engineering Laboratories." Philippine Engineering Journal .
Cita MLA (9th ed.)Cabrera, Macario P. "Maintenance in Engineering Laboratories." Philippine Engineering Journal, .
Atenció: Aquestes cites poden no estar 100% correctes.