APA način citiranja

Calvo, G., & Somarriba, E. (1999). Timber species for shade in new and old cocoa fields.

Čikaški stil citiranja

Calvo, G., i Eduardo Somarriba. Timber Species for Shade in New and Old Cocoa Fields. 1999.

MLA način citiranja

Calvo, G., i Eduardo Somarriba. Timber Species for Shade in New and Old Cocoa Fields. 1999.

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