APA (7th ed.) Citation

Harkness, D. A. E. (1945). A tract on agricultural policy. P.S. King and Staples limited.

Chicago Style (17th ed.) Citation

Harkness, D. A. E. A Tract on Agricultural Policy. Westminister [London]: P.S. King and Staples limited, 1945.

MLA (9th ed.) Citation

Harkness, D. A. E. A Tract on Agricultural Policy. P.S. King and Staples limited, 1945.