Valcarcel, L. J. (2007). Ecological footprint. College of Business Administration, University of the Philippines.
Citação norma ChicagoValcarcel, Lina J. Ecological Footprint. Quezon City: College of Business Administration, University of the Philippines, 2007.
Citação norma MLAValcarcel, Lina J. Ecological Footprint. College of Business Administration, University of the Philippines, 2007.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.