Complex sentence: Learning goal orientation is facilitated by goal setting, planning and effort which are all required in order to respond to constructive feedback (London, 1997; as cited in Heslin & Latham, 2004).
Split into simpler sentences: Learning goal orientation is facilitated by goal setting, planning and effort. Thus, these are all required to respond to constructive feedback (London, 1997; as cited in Heslin & Latham, 2004).