APA
Hellin J. J., Lopez-Ridaura S., Sonder K., Camacho Villa T. & Gardeazabal Monsalve A. (2019). A guide to scaling soil and water conservation in the Western Highlands of Guatemala. Mexico: CIMMYT.
Chicago
Hellin J J, Lopez-Ridaura S, Sonder K, Camacho Villa T.C and Gardeazabal Monsalve A. 2019. A guide to scaling soil and water conservation in the Western Highlands of Guatemala. Mexico: CIMMYT.
Harvard
Hellin J. J., Lopez-Ridaura S., Sonder K., Camacho Villa T. and Gardeazabal Monsalve A. (2019). A guide to scaling soil and water conservation in the Western Highlands of Guatemala. Mexico: CIMMYT.
MLA
Hellin J J, Lopez-Ridaura S, Sonder K, Camacho Villa T.C and Gardeazabal Monsalve A. A guide to scaling soil and water conservation in the Western Highlands of Guatemala. Mexico: CIMMYT. 2019.