Gaya APA
Center, S, P, G, T.
(2011).
Basic Safety Training
.
Jakarta:
Sinar Poseidon Gupita Training Centre.
Gaya MLA
Center, Sinar, Poseidon, Gupita, Training.
"Basic Safety Training".
Jakarta:
Sinar Poseidon Gupita Training Centre,
2011.
Text.