APA
Wolf W. Zuelzer, . (1957). Pediatric Clinics of North America. Philadelphia: W. B. Saunders Company.
Chicago
Wolf W. Zuelzer, . 1957. Pediatric Clinics of North America. Philadelphia: W. B. Saunders Company.
Harvard
Wolf W. Zuelzer, . (1957). Pediatric Clinics of North America. Philadelphia: W. B. Saunders Company.
MLA
Wolf W. Zuelzer, . Pediatric Clinics of North America. Philadelphia: W. B. Saunders Company. 1957.