(2004). UPCOE-NEC technical bulletin. UP Engineering Research and Development Foundation, Inc.
Cita Chicago (17th ed.)UPCOE-NEC Technical Bulletin. Quezon City: UP Engineering Research and Development Foundation, Inc, 2004.
Cita MLA (9th ed.)UPCOE-NEC Technical Bulletin. UP Engineering Research and Development Foundation, Inc, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.