Before applying to graduate school, she asked her professor for a letter of reference.

Scholars often debate how narratives compensate for absent referents in fragmented eyewitness accounts.

Before approving the loan, the bank requested several credit references to verify the applicant's payment history.

When analyzing relativity, physicists must carefully choose their frames of reference to describe motion.

The patient reported referred pains in her left arm and jaw, which were typical signs of cardiac ischemia.

When solving trigonometric equations, drawing the reference angles in each quadrant often makes the work much easier.

Before adopting the new protocol, we reviewed several reference implementations to ensure compatibility across platforms.

When calculating trigonometric values for a 210° angle, I first find the reference angle of 30° and then adjust the signs accordingly.

The doctor explained that the patient's shoulder pain was actually referred pain from a problem in the gallbladder.

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