Gaya APA
Petroleum, T, I, O. (1965).
Airfields safety code: bieng part 7. (1965).
:
Great Britain : The Institute of Petroleum,.
Gaya MLA
Petroleum, The, Institute, Of.
"Airfields safety code: bieng part 7.".
1965
:
Great Britain : The Institute of Petroleum,,
1965.
Text.