All the examples you provided are correct APA in-text citations, as they properly attribute the source to the author and year. However, if you were to look for a potential issue, it could be the use of "In Koehler (2016) we see examples..." because formal writing in APA style typically prefers a more neutral observer tone and might limit direct language such as "we see." A more neutral phrasing would be "Koehler (2016) provides examples..." or similar constructions.
If you are looking for a strict example that would not be considered correct, I would need citation information that did not adhere to APA standards (e.g., missing year, incorrect author formatting). However, based on the provided examples, they all reasonably conform to APA style in the context of conveying the information.
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