Cita APA (7a ed.)

Azeiteiro, U., Leal Filho, W., & Caeiro, S. (2014). E-learning and education for sustainability. PL Academic Research.

Cita Chicago Style (17a ed.)

Azeiteiro, Ulisses, Walter Leal Filho, y Sandra Caeiro. E-learning and Education for Sustainability. Frankfurt am Main, [Germany]: PL Academic Research, 2014.

Cita MLA (9a ed.)

Azeiteiro, Ulisses, et al. E-learning and Education for Sustainability. PL Academic Research, 2014.