APA (7th ed.) Citation

Blake, F. (1990). Organic farming and growing (2a. ed.). The Crowood.

Chicago Style (17th ed.) Citation

Blake, Francis. Organic Farming and Growing. 2a. ed. Londres: The Crowood, 1990.

MLA (9th ed.) Citation

Blake, Francis. Organic Farming and Growing. 2a. ed. The Crowood, 1990.