In APA style, in-text citations are placed within sentences and paragraphs so that it is clear what information is being quoted or paraphrased and whose information is being cited.
Examples:
Works by a single author
The last name of the author and the year of publication are inserted in the text at the appropriate point.
from theory on bounded rationality (Simon, 1945)
If the name of the author or the date appear as part of the narrative, cite only missing information in parentheses.
