In a previous post, we discussed which words should be capitalized in bibliographic references. Hyphenated compounds require special attention (see CMS §8.159).
The first element of a hyphenated compound is always capitalized. The second and subsequent elements are capitalized if one of the following conditions applies:
1. The first element is an independent word (as opposed to a prefix; see below)
Example: Social-Scientific Approaches to New Testament Interpretation
2. The second element is a proper noun or adjective.
Example: The Non-Israelite Nations in the Book of the Twelve
3. The two elements together constitute a spelled-out number.
Example: “The Twenty-Third Psalm in Book 1 of the Psalter”
If the first element of the hyphenated compound is a prefix, the second and subsequent elements are typically lowercased, unless (2) above applies.
Example: The Acts of the Apostles: A Socio-rhetorical Commentary
N.B. Although SBL Press style is not to hyphenate words such as sociorhetorical, one must retain any hyphenation used in the original publication.