Citation, Documentation of Sources

Q. How does one create a reference for a work currently at press? I know the title, journal, volume, and number, but not the pages.

A. Use the word “forthcoming” instead of the year; that will make it obvious why you don’t have page numbers. Until a work has actually been published, it should be listed as forthcoming, since publications are routinely delayed.

[This answer relies on the 17th edition of CMOS (2017) unless otherwise noted.]