Dyfyniad APA

David, Kohls, L Richard, & W Downey. (1972). Marketing of agriculture marketing. Newyork.

Dyfyniad Arddull Chicago

David, Kohls, L Richard, and W Downey. Marketing of Agriculture Marketing. Newyork, 1972.

Dyfyniad MLA

David, et al. Marketing of Agriculture Marketing. Newyork, 1972.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.