Wal, H. v. d. (1999). Chinantec shifting cultivation: InTERAcTIVE landuse : a case-study in the Chinantla, Mexico, on secondary vegetation, soils and crop performance under indigenous shifting cultivation. s.n.].
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Wal, Hans van der. Chinantec Shifting Cultivation: InTERAcTIVE Landuse : A Case-study in the Chinantla, Mexico, on Secondary Vegetation, Soils and Crop Performance Under Indigenous Shifting Cultivation. [Wageningen: s.n.], 1999.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Wal, Hans van der. Chinantec Shifting Cultivation: InTERAcTIVE Landuse : A Case-study in the Chinantla, Mexico, on Secondary Vegetation, Soils and Crop Performance Under Indigenous Shifting Cultivation. s.n.], 1999.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.