Παραπομπή APA

A W Norman & K Schaefer. (1977). Vitamin D: Biochemical, chemical and clinical aspects related to calcium metabolism. Berlin.

Παραπομπή Chicago Style

A W Norman και K Schaefer. Vitamin D: Biochemical, Chemical and Clinical Aspects Related to Calcium Metabolism. Berlin, 1977.

Παραπομπή MLA

A W Norman και K Schaefer. Vitamin D: Biochemical, Chemical and Clinical Aspects Related to Calcium Metabolism. Berlin, 1977.