Espiritu, L. A. P., Fabian, M. G., Lapeña, M. C. T., & Santos, M. L. V. (2004). National Research Center for Emerging Infectious Disease.
Cita Chicago (17th ed.)Espiritu, Lesley Ardelle P., Michelle G. Fabian, Mary Carmelle T. Lapeña, i Maria Lisa V. Santos. National Research Center for Emerging Infectious Disease. 2004.
Cita MLA (9th ed.)Espiritu, Lesley Ardelle P., et al. National Research Center for Emerging Infectious Disease. 2004.
Atenció: Aquestes cites poden no estar 100% correctes.