APA (7th ed.) Citation

United States. Agency for International Development & Edwards]. (1990). SUSTAINABLE agricultural systems. Soil and Water Conservation Society.

Chicago Style (17th ed.) Citation

United States. Agency for International Development and Edwards]. SUSTAINABLE Agricultural Systems. Ankeny, Iowa: Soil and Water Conservation Society, 1990.

MLA (9th ed.) Citation

United States. Agency for International Development and Edwards]. SUSTAINABLE Agricultural Systems. Soil and Water Conservation Society, 1990.