Gaya APA
Edmund 70 PTICS. (2011).
Singapura:
Edumund Optics.
Gaya Chicago
Edmund 70 PTICS.
.
Singapura:
Edumund Optics,
2011.
Text.
Gaya MLA
Edmund 70 PTICS.
.
Singapura:
Edumund Optics,
2011.
Text.
Gaya Turabian
Edmund 70 PTICS.
Singapura:
Edumund Optics,
2011.
Print.