Ayala, I. A. (1999). Modelling deep-seated slope failures in semi-arid southern Spain. Universidad Nacional Autónoma de México.
Citazione stile Chigago Style (17a edizione)Ayala, Irasema Alcántara. Modelling Deep-seated Slope Failures in Semi-arid Southern Spain. Universidad Nacional Autónoma de México, 1999.
Citatione MLA (9a ed.)Ayala, Irasema Alcántara. Modelling Deep-seated Slope Failures in Semi-arid Southern Spain. Universidad Nacional Autónoma de México, 1999.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.