How to cite a paper with erratum?
An erratum would usually only include the part to be corrected from the original publication. Hence it would be insufficient to cite just the erratum and not the original article. Examples of such errata are shown in the US NLM  site. Thus you must cite both original article as well as the errtum.
But there is a method to cite errata. You should cite the original article [A] in the main section and cite the errata [B] after the citation info of [A] in the references section.
Similar to this.

References:
[A] Authors of A. Title of A. In conf./article/report/etc. Erratum. Author of B [B]
[B] Info of B...

A simple example is provided in the answer here.