ROWLANDS, IAN and DAVID BAWDEN. "Digital Libraries: A Conceptual Framework" Libri, 49.4 (2009): 192-202. Retrieved 19 Jun. 2013, from doi:10.1515/libr.1999.49.4.192

ROWLANDS, I. & BAWDEN, D. (2009). Digital Libraries: A Conceptual Framework. Libri, 49(4), pp. 181-254. Retrieved 19 Jun. 2013, from doi:10.1515/libr.1999.49.4.192

ROWLANDS, IAN and DAVID BAWDEN. 2009. Digital Libraries: A Conceptual Framework. Libri. 49(4): 181-254. Retrieved 19 Jun. 2013, from doi:10.1515/libr.1999.49.4.192