References
^ Stuart M. Keeley, M. Neil BrowneAsking the Right Questions by M. Neil Browne and Stuart M. Keeley (2013, Paperback) ISBN 9780321907950 (revised Mar 2023)^ Browne, M. Neil; Keeley, Stuart M. (2015). Asking the Right Questions, Longman. BiggerBooks. ISBN 9780321907950 (revised Nov 2023)
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