APA aipamena

Polanka, S. (2011). No shelf required: E-books in libraries. Chicago: American Library Association.

Chicago Style aipamena

Polanka, Sue. No Shelf Required: E-books in Libraries. Chicago: American Library Association, 2011.

MLA aipamena

Polanka, Sue. No Shelf Required: E-books in Libraries. Chicago: American Library Association, 2011.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.