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Lua i Stíl Chicago (17ú heag.)Azeiteiro, Ulisses, Walter Leal Filho, agus Sandra Caeiro. E-learning and Education for Sustainability. Frankfurt am Main, [Germany]: PL Academic Research, 2014.
Lua MLA (9ú heag.)Azeiteiro, Ulisses, et al. E-learning and Education for Sustainability. PL Academic Research, 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.