Naval, P. J. Digital controller for stepping motor-driven X-ray diffractometer. Philippine Engineering Journal.
Lua i Stíl Chicago (17ú heag.)Naval, P.C. Jr. "Digital Controller for Stepping Motor-driven X-ray Diffractometer." Philippine Engineering Journal .
Lua MLA (9ú heag.)Naval, P.C. Jr. "Digital Controller for Stepping Motor-driven X-ray Diffractometer." Philippine Engineering Journal, .
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.