'Multi-agency Working in the Early Years: Challenges And Opportunities’ by Michael Gasper, published by SAGE publications, 1st edition

Find and read chapter 1 ‘What is partnership working? Where did it come from and why is it important’, paying close attention to the section ‘What is partnership working in practice: benefits, challenges, and leadership’.
You do not need to buy this book, you should be able to find a copy at your local library service.