APA
Sommer A., . (1995). Vitamin a deflciency and its consequences : a field guide to detection and control. World health organization, Geneva: .
Chicago
Sommer Alfred, . 1995. Vitamin a deflciency and its consequences : a field guide to detection and control. World health organization, Geneva: .
Harvard
Sommer A., . (1995). Vitamin a deflciency and its consequences : a field guide to detection and control. World health organization, Geneva: .
MLA
Sommer Alfred, . Vitamin a deflciency and its consequences : a field guide to detection and control. World health organization, Geneva: . 1995.