Gu, Ning and Maher, Mary Lou. "Index". Designing Adaptive Virtual Worlds, Warsaw, Poland: De Gruyter Open Poland, 2014, pp. 134-136. https://doi.org/10.2478/9783110367669.i
Gu, N. & Maher, M. (2014). Index. In Designing Adaptive Virtual Worlds (pp. 134-136). Warsaw, Poland: De Gruyter Open Poland. https://doi.org/10.2478/9783110367669.i
Gu, N. and Maher, M. 2014. Index. Designing Adaptive Virtual Worlds. Warsaw, Poland: De Gruyter Open Poland, pp. 134-136. https://doi.org/10.2478/9783110367669.i
Gu, Ning and Maher, Mary Lou. "Index" In Designing Adaptive Virtual Worlds, 134-136. Warsaw, Poland: De Gruyter Open Poland, 2014. https://doi.org/10.2478/9783110367669.i
Gu N, Maher M. Index. In: Designing Adaptive Virtual Worlds. Warsaw, Poland: De Gruyter Open Poland; 2014. p.134-136. https://doi.org/10.2478/9783110367669.i