Single word titles, such as Pediatrics, are not abbreviated.If no PubMed journal abbreviation exists, use standard abbreviations in the AMA Manual of Style to construct an abbreviated title.Use PubMed abbreviations for journal titles. See Journals referenced in the NCBI Databases.Journal titles are abbreviated and in italics.
In book chapter titles, capitalize only the first word.Do not capitalize the, an, a, in, for, or but, unless this word begins the title.In book titles, capitalize all major words and put in italics.If the citation extends to a second line, do NOT indent (as in APA).Two references should not be combined under a single reference number.Number references consecutively with arabic numerals in the order in which they are cited in the text.Numbers greater than 100 are spelled out.When spelling out numerals, hyphenate twenty-one through ninety-nine when these numbers occur alone or as part of a larger number.e.g., "If 12 16-year-olds had this reaction." should be changed to "If twelve 16-year-olds." One number may be spelled out, if the sentence requires multiple numbers to be placed next to each other.Spell out numbers in quotations or titles of works cited.Example: Of those attending, nearly three-fourths were members of the association.Common fractions are expressed with hyphenated words.Better: The study population comprised 328 men and 126 women.Okay: Three hundred twenty-eight men and 126 women were included in the study.However, it may be better to reword the sentence so that it does not begin with a number. Use words to express numbers that occur at the beginning of a sentence, title, subtitle, or heading.Numerals (1, 2, 3, etc.) should be used in all writing, except when: For even more detailed information on the proper use of numerals, see section 19.2 of the AMA Manual.
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