APA (7e ed.) Bronvermelding

Barrezueta-Unda, S. (2019). Properties of several soils cultivated with cocoa in the province of El Oro, Ecuador. Universidad Autónoma de Tamaulipas.

Chicago (17e ed.) Bronvermelding

Barrezueta-Unda, Salomón. Properties of Several Soils Cultivated with Cocoa in the Province of El Oro, Ecuador. Universidad Autónoma de Tamaulipas, 2019.

MLA (8e ed.) Bronvermelding

Barrezueta-Unda, Salomón. Properties of Several Soils Cultivated with Cocoa in the Province of El Oro, Ecuador. Universidad Autónoma de Tamaulipas, 2019.