Gaya APA
Lemoff, T, C, , (.
(1988).
National fuel gas code handbook.
(
1988)
.
:
Arlington : NFPA, AGA,.
Gaya MLA
Lemoff, Theodore, C., , (ed).
"National fuel gas code handbook.".
1988
:
Arlington : NFPA, AGA,,
1988.
Text.