There are a few different ways to include in-text citations, but in general, there are two main ways in which to do this narrative and parenthetical:
See this guide on APA in-text citations for more details, examples, and information on in-text citations: https://libguides.pvcc.edu/citationstyles/apa7-intext
Add quotations around the words and incorporate the quote into your text. Before adding punctuation to the end of the quote (such as a comma or period), first add the in-text citation in parentheses followed by the punctuation mark. Be sure to add the page number (from the PDF) at the end. See the example below for an example.
Although there is a small but statistically significant correlation between mentions to research outputs on Twitter and future citations, the researchers "did not directly test that high altmetric scores today make high citations tomorrow more likely" (Thelwall et al., 2010, p. 5).
Narrative in-text citation to a block quote:
With regards to differentiating between negative perfectionism and positive perfectionism, Aldahadha (2018) concluded that:
The fear of rejection and constant concern about the possibility of failure and mistrust with others may be the main cause of anxiety and stress, all of which may be due to negative perfectionism and these emotions may lead to defense and negative social relations with others. The results of several studies have shown that negative perfectionism has other bad outcomes, which are more psychological stress due to feelings of failure, loss of self-control, and fear of loss, followed by loss of motivation and procrastination. (p. 9)
Parenthetical in-text citation to a block quote:
With regards to differentiating between negative perfectionism and positive perfectionism, one researcher concluded that:
The fear of rejection and constant concern about the possibility of failure and mistrust with others may be the main cause of anxiety and stress, all of which may be due to negative perfectionism and these emotions may lead to defense and negative social relations with others. The results of several studies have shown that negative perfectionism has other bad outcomes, which are more psychological stress due to feelings of failure, loss of self-control, and fear of loss, followed by loss of motivation and procrastination. (Aldahadha, 2018, p. 9)