Solis, A. (1999). Supply Oilfield Services. AmCham Philippines Business Journal.
Cita Chicago (17th ed.)Solis, A.J. "Supply Oilfield Services." AmCham Philippines Business Journal 1999.
Cita MLA (9th ed.)Solis, A.J. "Supply Oilfield Services." AmCham Philippines Business Journal, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.