Gaya APA
Tambunan, Tigor. (2007).
Personal protective equipment (edisi 1).
Yogyakarta:
Graha Ilmu.
Gaya Chicago
Tambunan, Tigor.
Personal protective equipment.
edisi 1
Yogyakarta:
Graha Ilmu,
2007.
Text.
Gaya MLA
Tambunan, Tigor.
Personal protective equipment.
edisi 1
Yogyakarta:
Graha Ilmu,
2007.
Text.
Gaya Turabian
Tambunan, Tigor.
Personal protective equipment.
edisi 1
Yogyakarta:
Graha Ilmu,
2007.
Print.