APA
Schrag L., . (1982). Healthy calves-healthy cattle. Auestein: Verlag.
Chicago
Schrag Ludwig, . 1982. Healthy calves-healthy cattle. Auestein: Verlag.
Harvard
Schrag L., . (1982). Healthy calves-healthy cattle. Auestein: Verlag.
MLA
Schrag Ludwig, . Healthy calves-healthy cattle. Auestein: Verlag. 1982.