Hrehorovich, V. R., Schrack, W. D., Hall, D. A., Longenecker, R. E., & Gratch, I. F. (1970). Influenza surveillance in Pennsylvania.
Chicago Style CitationHrehorovich, V. R., W. D. Schrack, D. A. Hall, R. E. Longenecker, i I. F. Gratch. Influenza Surveillance in Pennsylvania. 1970.
Cita MLAHrehorovich, V. R., et al. Influenza Surveillance in Pennsylvania. 1970.
Atenció: Aquestes cites poden no estar 100% correctes.