AMA citation style requires that journal titles be abbreviated for references. Unfortunately, you don’t get to make up your own abbreviations – you must use the abbreviations put forth by the National Library of Medicine. As you can see, this is a citation formatted in AMA style. The journal title is abbreviated; and stands for the American Journal of Clinical Nutrtiion. To find the correct abbreviation for a journal first go to the NLM Catalog by typing in the URL seen here; or simply by Googling “nlm journal catalog” To find the correct title abbreviation for the Journal of Personality and Social Psychology, find the search box and type in the full title of the journal, using quotations marks at the beginning and end. If there is more than one title in the list, browse to find the title you are looking for. Once you find the correct title, find the second line below the journal title for the NLM Title Abbreviation. Seen here. This is the journal title abbreviation to use for the reference citation. Note that there is no punctuation in the abbreviated title. The NLM Catalog does not have records and abbreviations for all journals. For example, the journal Archives of Agronomy and Soil Science is not found in the NLM database, even though this journal publishes some articles on nutrition. When the NLM Catalog does not have a record for a specific journal, simply use the entire unabbreviated title in the reference citation. If you have only the abbreviation for a journal title and you need to unabbreviate it, you can likewise search the abbreviated title to get to the full title. For example a search for the abbreviation finds the journal title Annals of Nutrition and Metabolism.