APA引文

David, G. W. (1988). Practice beef quality grading. Lubbock: Creative Educational Video.

Chicago Style Citation

David, Gordon W. Practice Beef Quality Grading. Lubbock: Creative Educational Video, 1988.

MLA引文

David, Gordon W. Practice Beef Quality Grading. Lubbock: Creative Educational Video, 1988.

警告：這些引文格式不一定是100％准確.