APA
O'Mary C. C., Dyer I. A., . (1978). Commercial beef cattle production. Philadelphia: Lea & Febiger.
Chicago
O'Mary C C, Dyer Irwin Allen, . 1978. Commercial beef cattle production. Philadelphia: Lea & Febiger.
Harvard
O'Mary C. C., Dyer I. A., . (1978). Commercial beef cattle production. Philadelphia: Lea & Febiger.
MLA
O'Mary C C, Dyer Irwin Allen, . Commercial beef cattle production. Philadelphia: Lea & Febiger. 1978.