Gaya APA

Moldenhauer, W. et al (1992). Conservation Policies For Sustainable Hillslope Farming . United States of America: Soil and Water Conservaion Society.

Gaya MLA

Moldenhauer, William. et al. "Conservation Policies For Sustainable Hillslope Farming". United States of America: Soil and Water Conservaion Society, 1992. Text.