Answer:
A. American Psychological Association
Explanation:
The American Psychological Association began publishing guidelines for writing and references citation in early 20th century. Â Their latest edition, the sixth, Â was released in 2009.
These guidelines were developed to enhance the standardization of the references types and to improve the quality of communication, especially in science.
It's a structure guide used by a large number of scientific publications, both books and magazines, and in the academic world.
