WASET
    Hélder Spínola,  Sustainable Development Contributions among University of Madeira (Portugal) Students.   journal   = {International Journal of Educational and Pedagogical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    June 2012, vol. 66(6). 1464 - 1468
    [viewed 29 March 2024]. Available from: https://publications.waset.org/pdf/5498.