Cita APA (7a ed.)

De Geus, J. G. (1967). Fertilizer guide for tropical and subtropical farming. Centre d`Etude de l`Azote.

Cita Chicago Style (17a ed.)

De Geus, J. G. Fertilizer Guide for Tropical and Subtropical Farming. Zurich: Centre d`Etude de l`Azote, 1967.

Cita MLA (8a ed.)

De Geus, J. G. Fertilizer Guide for Tropical and Subtropical Farming. Centre d`Etude de l`Azote, 1967.