Hi-In Turabian/Chicago,How do I do shortened references when there are multiple references corresponding to multiple volumes in the same work? Keep the volume number in the shortened or leave it out? Actually--Here is the source:
Philip Schaff, ed. The Nicene and Post-Nicene Fathers (Oak Harbor, WA: Logos Research Systems, 1997), 6: XX. (My client is using several different volumes.) THANKS FOR ANY HELP--I CANNOT FIND IT IN THE MANUAL!

Question

Hi-In Turabian/Chicago,How do I do shortened references when there are multiple references corresponding to multiple volumes in the same work?  Keep the volume number in the shortened or leave it out? Actually--Here is the source:
 Philip Schaff, ed. The Nicene and Post-Nicene Fathers (Oak Harbor, WA: Logos Research Systems, 1997), 6: XX. (My client is using several different volumes.)  THANKS FOR ANY HELP--I CANNOT FIND IT IN THE MANUAL!