Gaya APA
), A, P, I, (, A. (1978).
Specification for Thermoplastic Line Pipe ( PVC and CPVC ) (1978).
:
USA : API,.
Gaya MLA
), American, Petroleum, Institute, (, API.
"Specification for Thermoplastic Line Pipe ( PVC and CPVC )".
1978
:
USA : API,,
1978.
Text.