Gaya APA

ICAO, . (1952). CIRCULAR 23-AN/20 PROBLEMS ASSOCIATED WITH THE ADVENT OF TURBINE-ENGINED AIRPLANES . Canada: ICAO.

Gaya MLA

ICAO, . "CIRCULAR 23-AN/20 PROBLEMS ASSOCIATED WITH THE ADVENT OF TURBINE-ENGINED AIRPLANES". Canada: ICAO, 1952. Text.