I completed my PMI-SP certification in January. I used the PMBOK, specifically chapters: Time, Cost, Communications, Risk, Scope, Project Integration.
I caution you to not just concentrate on Project time only because when you are scheduling alot of areas are inputs and outputs.
VTC https://www.vtc.com/ (great site)
PMI-SP exam specification
I will be more than happen to answer any additional information you have –please feel free to email me at jandsue@charter.net
