एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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