In-text citation refers to the brief citations included within the text of your paper. They point your reader to the full citation at the end of your paper.
In APA, the in-text citation is generally placed in parenthesis at the end of your sentence with the author's last name and year.
The page number is also required if you are directly quoting from a source.
The period goes after/outside the parenthesis.
You can also include the author's name in the text itself and simply place the year in parenthesis after the author's last name.
Flores et al. (2018) described how they addressed potential researcher bias when working with an intersectional community of transgender people of color:
Everyone on the research team belonged to a stigmatized group but also held privileged identities. Throughout the research process, we attended to the ways in which our privileged and oppressed identities may have influenced the research process, findings, and presentation of results. (p. 311)
Researchers have studied how people talk to themselves:
Inner speech is a paradoxical phenomenon. It is an experience that is central to many people’s everyday lives, and yet it presents considerable challenges to any effort to study it scientifically. Nevertheless, a wide range of methodologies and approaches have combined to shed light on the subjective experience of inner speech and its cognitive and neural underpinnings. (Alderson-Day & Fernyhough, 2015, p. 957)
2 Authors from Same Source