APA (7th ed.) Citation

ScienceDirect (Online service) & Haas, W. (2008). Influenza. Elsevier.

Chicago Style (17th ed.) Citation

ScienceDirect (Online service) and Walter Haas. Influenza. Munich: Elsevier, 2008.

MLA (9th ed.) Citation

ScienceDirect (Online service) and Walter Haas. Influenza. Elsevier, 2008.

Warning: These citations may not always be 100% accurate.