The American Psychological Association (APA) standardizes research and citation forms in scientific and social science areas, including nursing. The four major divisions of the APA are the American Psychological Society (APS), which publishes the journal Psychology Today; the National Academy of Sciences (NAS); the National Academy of Medicine (NAM); and the Institute for Scientific Information (ISI). Nurses publish many articles in peer-reviewed journals. It is important for nurses to follow publication guidelines from organizations such as the Nursing Research Council (NRC) and the International Nursing Answering Service (INAS). These guidelines help ensure that articles are sound scientifically and that authors' intentions are understood. Nurses may choose to cite APA recommendations when writing their papers. However, because not all nurses are trained in psychology or neuroscience, they may prefer to follow other citation styles instead. If this is the case, then their publications should include a method statement explaining the background and rationale for the citation style being used.