APA
Harsfall F. L. (., . (1949). Diagnosis of viral and rickettsial infections: symposium held at the new york academy of medicine Jan 29, 30 1948. New York: Columbia University Press.
Chicago
Harsfall F L (ed.), . 1949. Diagnosis of viral and rickettsial infections: symposium held at the new york academy of medicine Jan 29, 30 1948. New York: Columbia University Press.
Harvard
Harsfall F. L. (., . (1949). Diagnosis of viral and rickettsial infections: symposium held at the new york academy of medicine Jan 29, 30 1948. New York: Columbia University Press.
MLA
Harsfall F L (ed.), . Diagnosis of viral and rickettsial infections: symposium held at the new york academy of medicine Jan 29, 30 1948. New York: Columbia University Press. 1949.