Gaya APA
Sahulata, D. (1988).
An Introduction to sounds and sounds systems of english/ Daniel Sahulata .
Jakarta:
Dirjen Dikti Depdikbud.
Gaya MLA
Sahulata, Daniel.
"An Introduction to sounds and sounds systems of english/ Daniel Sahulata".
Jakarta:
Dirjen Dikti Depdikbud,
1988.
Text.