APA   Click to copy
Greiff, S., Niepel, C., & Wüstenberg, S. (2015). 21st century skills. Recent advancements and international developments. Special Issue. Thinking Skills &Amp; Creativity. https://doi.org/10.1016/j.tsc.2015.04.007

Chicago/Turabian   Click to copy
Greiff, S., C. Niepel, and S. Wüstenberg. “21st Century Skills. Recent Advancements and International Developments. Special Issue.” Thinking Skills & Creativity (2015).

MLA   Click to copy
Greiff, S., et al. “21st Century Skills. Recent Advancements and International Developments. Special Issue.” Thinking Skills &Amp; Creativity, 2015, doi:10.1016/j.tsc.2015.04.007.

@article{greiff2015a,
  title = {21st century skills. Recent advancements and international developments. Special Issue},
  year = {2015},
  journal = {Thinking Skills & Creativity},
  doi = {10.1016/j.tsc.2015.04.007},
  author = {Greiff, S. and Niepel, C. and Wüstenberg, S.}
}