Chicago Style Headings. The Chicago Manual of Style does not provide authors with any strict rules regarding the format of headings and subheadings in the document. In author-date style mostly used in the sciences you use brief parenthetical references to cite sources in the text. Do not use bold or large size font for the heading. In general subheads stand out more when centered in bold or italic type or capitalized headline-style than when flush left in regular type or capitalized sentence-style.
In author-date style citations are placed directly in the text in parentheses. This manual which presents what is commonly known as the Turabian citation style follows the two CMOS patterns of documentation but offers slight modifications suited to student texts. Chicago style paper format suggests the following set of guidelines for headings and subheadings. There can be up to five levels of headings in your paper. While you will not find any prescribed system for formatting headings and subheads in The Chicago Manual of Style there are some recommendations in it. The Chicago Manual of Style provides guidelines for two styles of citation.
Chicago provides guidelines for not one but two citation styles.
Titles in the text as well as in notes and bibliographies are treated with quotation marks or italics based on the type of work they name. Davis 2016 argues that the theory is sound. The level of hierarchy in the headings and subheadings must be clear and consistent. Use Headline Style to capitalize headings. Some use title case. Author-date and notes and bibliography.