APA

Eryomkina O. V., Volkova N. V., .Sports marketing. : .

Chicago

Eryomkina O V, Volkova N V, .Sports marketing. : .

Harvard

Eryomkina O. V., Volkova N. V., .Sports marketing. : .

MLA

Eryomkina O V, Volkova N V, .: . .