Cita APA (7a ed.)

De Geus, J. G. (1970). Fertilizer guide: For food grains in the tropics and subtropics. Centre d`Etude de l`Azote.

Cita Chicago Style (17a ed.)

De Geus, J. G. Fertilizer Guide: For Food Grains in the Tropics and Subtropics. Zurich: Centre d`Etude de l`Azote, 1970.

Cita MLA (8a ed.)

De Geus, J. G. Fertilizer Guide: For Food Grains in the Tropics and Subtropics. Centre d`Etude de l`Azote, 1970.