Singapore. Dept. of Civil Aviation. Civil aviation. Govt. Print. Off.].
Dyfyniad Arddull ChicagoSingapore. Dept. of Civil Aviation. Civil Aviation. [Singapore: Govt. Print. Off.].
Dyfyniad MLASingapore. Dept. of Civil Aviation. Civil Aviation. Govt. Print. Off.].
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.