Cita APA (7a ed.)

Astor, W. A., & Rowntree, B. S. (1939). British agriculture: The principles of future policy (New up-to-date ed.). Penguin.

Cita Chicago Style (17a ed.)

Astor, Waldorf Astor, y B. Seebohm Rowntree. British Agriculture: The Principles of Future Policy. New up-to-date ed. Harmondsworth: Penguin, 1939.

Cita MLA (9a ed.)

Astor, Waldorf Astor, y B. Seebohm Rowntree. British Agriculture: The Principles of Future Policy. New up-to-date ed. Penguin, 1939.