Gaya APA
Tambunan, T.
(2007).
Personal Protective Equipment
(
Ed. 1 Cet. 1)
.
Yogyakarta:
Graha Ilmu.
Gaya MLA
Tambunan, Tigor.
"Personal Protective Equipment".
Ed. 1 Cet. 1
Yogyakarta:
Graha Ilmu,
2007.
TEXT.