Cabrera, M. P. Maintenance in engineering laboratories. Philippine Engineering Journal.
Citazione stile Chigago Style (17a edizione)Cabrera, Macario P. "Maintenance in Engineering Laboratories." Philippine Engineering Journal .
Citatione MLA (9a ed.)Cabrera, Macario P. "Maintenance in Engineering Laboratories." Philippine Engineering Journal, .
Attenzione: Queste citazioni potrebbero non essere precise al 100%.