APA ציטוט

Piedra Constantino, R. d. l. (1997). Evaluation of sustainable production systems in hillsides, La Fraylesca, Chiapas, México.

Citación estilo Chicago

Piedra Constantino, R. de la. Evaluation of Sustainable Production Systems in Hillsides, La Fraylesca, Chiapas, México. 1997.

ציטוט MLA

Piedra Constantino, R. de la. Evaluation of Sustainable Production Systems in Hillsides, La Fraylesca, Chiapas, México. 1997.