Many collections in HeinOnline offer a Citation Navigator feature; also, HeinOnline uses Bluebook citation format.
For example, if you need 148 Cong. Rec. 10265, you would begin by entering the U.S. Congressional Documents database. Once you do this, you will click on the Citation Navigator option underneath the main search bar.
From here, you would enter 148 in the Vol. box, and 10265 in the Page box. You can use the drop-down menu to select your abbreviation.