@inbook{Gray,2011,
author = {Gray, D. and Jackson, P.},
title = {Coaching supervision in the historical context of psychotherapeutic and counselling models: A meta-model.},
booktitle = {Coaching and mentoring supervision theory and practice},
editor = {Bachkirova, T. and Jackson, P. and Clutterbuck, D.},
pages = {15-27},
year = {2011},
publisher = {Open University Press},
language = {English},
url = {www.academia.edu/3251142/Coaching_supervision_in_the_historical_context_of_psychotherapeutic_and_counselling_models_a_meta-model}
}