APA (7th ed.) Citation

Metcalf, D. H. (1969). The economics of agriculture. Penguin.

Chicago Style (17th ed.) Citation

Metcalf, David H. The Economics of Agriculture. [Harmondsworth]: Penguin, 1969.

MLA (9th ed.) Citation

Metcalf, David H. The Economics of Agriculture. Penguin, 1969.