@article{O’Brien,1997,
author = {O’Brien, M.},
title = {Executive coaching},
number = {4},
journal = {Supervision},
pages = {6--8},
year = {1997},
language = {English},
url = {www.simpsonexecutivecoaching.com/pdf/ceo/executive-coaching-michael-obrien.pdf},
volume = {58}
}