Lopez de Leon, A. (2010). Brain drain hits geologists, engineers. Malaya.
Cita Chicago (17th ed.)Lopez de Leon, Angela. "Brain Drain Hits Geologists, Engineers." Malaya 2010.
Cita MLA (9th ed.)Lopez de Leon, Angela. "Brain Drain Hits Geologists, Engineers." Malaya, 2010.
Atenció: Aquestes cites poden no estar 100% correctes.