Engineering resources typically use IEEE citation. The IEEE website provides examples of how to cite and how to structure a paper in this style.
IEEE follows this format:
R. Fardel, M. Nagel, F. Nuesch, T. Lippert, and A. Wokaun, “Fabrication of organic light emitting diode pixels by laser-assisted forward transfer,” Appl. Phys. Lett., vol. 91, no. 6, Aug. 2007, Art. no. 061103.
The library can guide you to citation management software and resources to help you properly cite your sources.