You are summarizing information from pages 3-5 of an article published in 2014 by Lee er al. What is missing from this in text citation (Lee te al, 2014).

Since it's not a content from a book, in your citation, there is the need to mention the page. That is (Lee et al. 2014, 3 - 5)

Between pages 3 and 5, if the text sites more than one author, there is the need to include "a", "b" and/or "c" as the case may be.

Cheers