Answered By: Reeti Brar
Last Updated: Oct 09, 2023     Views: 11

When you are referencing the same drug with the same publication date or no date. To distinguish them, you should add a letter after the year (e.g., 2021a, 2021b). If there is no date provided, you can reference them as:  n.d.-a, n.d.-b.


This aligns with the following APA rule 8.19 Citing works with same or no date, see link below


In your in-text citations, it would look like this:

("Vancomycin," n.d.-a).

("Vancomycin," n.d.-b).


For your reference list entry, it should be structured as follows:

Vancomycin. (n.d.-a). In AusDI. Retrieved September 10, 2023, from

Vancomycin. (n.d.-b). In  Australian Medicines Handbook. Retrieved September 10, 2023, from


For more information on how to reference health, drug and point of care resources please refere to our APA specialist subject material:Health resources page. See link below