Cita APA

DOUGLAS, M., & NORMAN, D. (2007). FARMING SYSTEMS DEVELOPMENT AND SOIL CONSERVATION.

Chicago Edition Citation

DOUGLAS, MALCOLM, i DAVID NORMAN. FARMING SYSTEMS DEVELOPMENT AND SOIL CONSERVATION. DELHI, DAYA PUBLISHING HOUSE, 2007.

Cita MLA

DOUGLAS, MALCOLM, i DAVID NORMAN. FARMING SYSTEMS DEVELOPMENT AND SOIL CONSERVATION. 2007.