APA
Illingworth R. S., . (1989). Common symptoms of disease in children. Delhi: Oxford University Press.
Chicago
Illingworth R S, . 1989. Common symptoms of disease in children. Delhi: Oxford University Press.
Harvard
Illingworth R. S., . (1989). Common symptoms of disease in children. Delhi: Oxford University Press.
MLA
Illingworth R S, . Common symptoms of disease in children. Delhi: Oxford University Press. 1989.