MLA

Popkova, Elena G. Business 4. 0 As a Subject of the Digital Economy. Cham: Springer International Publishing AG, 2022.

APA

Popkova, E. G. (2022). Business 4. 0 As a Subject of the Digital Economy. Cham: Springer International Publishing AG.

Chicago

Popkova, Elena G. Business 4. 0 As a Subject of the Digital Economy. Cham: Springer International Publishing AG, 2022.