when clustered or in a tabular format, use numerals: 3 credits, a 4-credit course, 1 credit hour; when including the number of credits in a list of courses, use the abbreviation cr with no period: Poli Sci 377 Nuclear Weapons and World Politics, 3 cr; Music 231 Elementary/Intermediate Violin, 2–4 cr.; in running text, spell out credits: All students must take 3 credits in art history; for additional examples, see the academic Guide