@book{Allen,2005,
author = {Allen, W. and Grodzki, L.},
title = {The Business and Practice of Coaching: Finding Your Niche, Making Money, & Attracting Ideal Clients},
year = {2005},
publisher = {Norton & Company},
language = {English},
url = {books.google.com/books?id=t-JeAgAAQBAJ&lpg=PR9&ots=H1mRIMZs7z&dq=%22the%20business%20and%20practice%20of%20coaching%3A%20finding%20your%20niche%22&lr&pg=PR9#v=onepage&q=%22the%20business%20and%20practice%20of%20coaching:%20finding%20your%20niche%22&f=false}
}