How to abbreviate Echo?

The ways to abbreviate Echo.

3
E:
Echo(Navy phonetic alphabet, Army phonetic alphabet, Military alphabet)
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APASmart Define. (2018). echo. Retrieved September 20, 2026, from http://smartdefine.org/echo/abbreviations/a
ChicagoSmart Define. 2018. "echo" http://smartdefine.org/echo/abbreviations/a (accessed September 20, 2026).
HarvardSmart Define 2018, echo, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/echo/abbreviations/a>.
MLASmart Define. "echo" 7 February 2018. Web. 20 September 2026. <http://smartdefine.org/echo/abbreviations/a>