APA citiranje

Popkova, E. G., & Sergi, B. S. (2020). The 21st Century from the Positions of Modern Science: Intellectual, Digital and Innovative Aspects. Springer International Publishing.

Trích dẫn kiểu Chicago

Popkova, Elena G., và Bruno S. Sergi. The 21st Century From the Positions of Modern Science: Intellectual, Digital and Innovative Aspects. Springer International Publishing, 2020.

MLA citiranje

Popkova, Elena G., và Bruno S. Sergi. The 21st Century From the Positions of Modern Science: Intellectual, Digital and Innovative Aspects. Springer International Publishing, 2020.