| Author | Title | Link |
| International Telecommunication Union (Radiocommunication Sector) | Handbook on Amateur and amateur-satellite services: Edition of 2026 (ITU 2026) |
(https://www.itu.int/dms_pub/itu-r/opb/hdb/R-HDB-52-2026-PDF-E.pdf ) |
| Industry Canada, Radiocommunications and Broadcasting Regulatory Branch | Radio Information Circular 22: General Radio Operating Procedures (Ottawa) [RIC-22, Issue 4, January 2008] | |
| North Atlantic Treaty Organization (NATO) | NATO Joint Military Symbology |
(https://nso.nato.int/nso/nsdd/main/standards/ap-details/3562/EN ) |
| Federal Emergency Management Agency (FEMA) | Incident Command System (ICS) Training Reference Guide (March 2023) |
Download ics_training_reference_guide (https://training.fema.gov/emiweb/is/icsresource/assets/ics_training_reference_guide.pdf ) |
| QST Amateur Radio Periodical (1915 to 2001) |