I found this book very helpful - PMBOK® GUIDE is a great teacher and writer. Probably A Guide to the PROJECT MANAGEMENT BODY OF KNOWLEDGE is the one of the best on the topic
Michele D. RitzParis
The concepts explained in A Guide to the PROJECT MANAGEMENT BODY OF KNOWLEDGE PDF book are not the simplest ones. But however, PMBOK® GUIDE is a higly-skilled in making such kind of material easy to understand and implement in practice.
Britney2002 WildePasadena
PMBOK® GUIDE is the best! A Guide to the PROJECT MANAGEMENT BODY OF KNOWLEDGE is certainly a good one for MBA students