Παραπομπή APA

Polanka, S. (2011). No shelf required: E-books in libraries. Ess Ess Publications.

Παραπομπή Chicago Style

Polanka, Sue. No Shelf Required: E-books in Libraries. New Delhi: Ess Ess Publications, 2011.

Παραπομπή MLA

Polanka, Sue. No Shelf Required: E-books in Libraries. Ess Ess Publications, 2011.