The following reference list examples follow APA 7 guidelines.
U.S. Department of the Army. (2011). The Army Family Advocacy Program: Army regulation 608-18. https://armypubs.army.mil/epubs/DR_pubs/DR_a/pdf/web/r608_18.pdf
Under Secretary of Defense for Acquisition, Technology, and Logistics. (2018, August 31). The defense acquisition system (DOD Directive 5000.1). https://www.esd.whs.mil/Portals/54/Documents/DD/issuances/dodd/500001p.pdf
Exec. Order. No. 13,767, 3 C.F.R. 263 (2017). https://www.govinfo.gov/content/pkg/CFR-2018-title3-vol1/pdf/CFR-2018-title3-vol1.pdf
Renewable Energy Production Incentives, 10 C.F.R. § 451 (2006). https://www.ecfr.gov/current/title-10/chapter-II/subchapter-D/part-451
Headquarters, Department of the Army. (1994). Sniper training (FM 23-10). https://www.bits.de/NRANEU/others/amd-us-archive/fm_23-10%2894%29.pdf
U.S. Department of Defense. (2020, April 30). Department of Defense annual report on sexual assault in the military, Fiscal year 2019 (No. D-A4BC881). https://media.defense.gov/2020/Apr/30/2002291660/-1/-1/1/1_DEPARTMENT_OF_DEFENSE_FISCAL_YEAR_2019_ANNUAL_REPORT_ON_SEXUAL_ASSAULT_IN_THE_MILITARY.PDF
See APA 7, Section 10.4 for information on citing government and other reports.
Takia, T. (2013). Adoption of the national information exchange model within the Department of Defense [Memorandum]. http://dodcio.defense.gov/Portals/0/Documents/2013-03-28%20Adoption%20of%20the%NIEM%20within%20the%20DoD.pdf