APA način citiranja

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

Čikaški stil citiranja

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

MLA način citiranja

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