Protection of Human Subjects, 45 C.F.R. § 46 (2009). https://www.hhs.gov/ohrp/sites/default/files/ohrp/policy/ohrpregulations.pdf
(Protection of Human Subjects, 2009).
Most Code of Federal Regulations APA citations have these basic elements:
Protection of Human Subjects,
45
C.F.R.
§ 46
(2009).
https://www.hhs.gov/ohrp/sites/default/files/ohrp/policy/ohrpregulations.pdf
See The University of Akron's Bluebook Quick Reference: Abbreviations and How-tos for help with abbreviations​.
See Publication Manual, 11.7