Gaya APA
ICAO, . (1969).
Circular 53 Provisional Acceptable Means Of Compliance Testing Of Pressure - Sensitive Altimeters .
Canada:
ICAO.
Gaya MLA
ICAO, .
"Circular 53 Provisional Acceptable Means Of Compliance Testing Of Pressure - Sensitive Altimeters".
Canada:
ICAO,
1969.
E-Book.