Стиль цитування APA (7-ме видання)

Piatkova, H. (2015). E-texts and e-books (readers) as a means to guarantee free access to knowledge and information.

Чикаго стиль цитування (17-те видання)

Piatkova, H. E-texts and E-books (readers) as a Means to Guarantee Free Access to Knowledge and Information. 2015.

Стиль цитування MLA (8-ме видання)

Piatkova, H. E-texts and E-books (readers) as a Means to Guarantee Free Access to Knowledge and Information. 2015.