Managing Software Requirements the Agile Way: Fred Heath

Agile Practice Guide by Project Management Institute

Agile Contracts: Creating and Managing Successful Projects with Scrum

Agile Contracts: Creating and Managing Successful Projects with Scrum by Gloger

PMBOK A Guide to the Project Management Body of Knowledge & AGILE practice guide

Managing Agile Projects

Agile Leadership Toolkit: Learning to Thrive with Self-Managing Teams by Peter K