The chapters cross-referred each other to clarify overlapping topics.

When designing the API, make sure the reference type is documented so callers understand whether they receive a direct copy or an alias.

In special relativity, observers in different reference frames can disagree on the simultaneity of events.

To measure the object's velocity correctly, you must specify the reference frame used for the observations.

I had to visit the reference library because the rare atlases there are non-circulating and cannot be checked out.

When calibrating the telescope's photometry, we observed the reference star whose magnitude had been measured to high precision.

Many university departments maintain small reference libraries for students researching niche topics.

During the panel discussion, her repeated self-references undermined her credibility.

The compiler reported several forward references that needed to be resolved before linking.

The spreadsheet crashed because of circular references in several formulas.