1 2 Rosenhead 2013, p. 1162 Harvnb 1 2 Rosenhead 1996, p. 117 Harvnb ↑ Checkland & Poulter 2006 Harvnb ↑ Friend & Hickling 1996 Harvnb ↑ Reynolds & Holwell 2010, p. 135–190 Harvnb ↑ Rosenhead 1996, p. 118 ↑ For example: Chatjoulis & Humphreys 2007 ↑ For examples, see: Norris 1985, p. 871; Dunn 1988, p. 720; Landis 1988, pp. 117–119.