Tonjes, J. J. (1994). The pineapple in the atlantic zone of Costa Rica: A study on the sustainability of the cropping system of pineapple in the Atlantic Zone of Costa Rica.
استشهاد بنمط شيكاغوTonjes, J. J. The Pineapple in the Atlantic Zone of Costa Rica: A Study On the Sustainability of the Cropping System of Pineapple in the Atlantic Zone of Costa Rica. 1994.
MLA استشهادTonjes, J. J. The Pineapple in the Atlantic Zone of Costa Rica: A Study On the Sustainability of the Cropping System of Pineapple in the Atlantic Zone of Costa Rica. 1994.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.