APA
Drogin R., Orkin M., . (1975). Vital statistics. New Delhi: Tata McGraw Hill.
Chicago
Drogin Richard, Orkin Michael, . 1975. Vital statistics. New Delhi: Tata McGraw Hill.
Harvard
Drogin R., Orkin M., . (1975). Vital statistics. New Delhi: Tata McGraw Hill.
MLA
Drogin Richard, Orkin Michael, . Vital statistics. New Delhi: Tata McGraw Hill. 1975.