APA
Guilfoile P., . (2009). Diphtheria. New York: Chelsea House.
Chicago
Guilfoile Patrick, . 2009. Diphtheria. New York: Chelsea House.
Harvard
Guilfoile P., . (2009). Diphtheria. New York: Chelsea House.
MLA
Guilfoile Patrick, . Diphtheria. New York: Chelsea House. 2009.