Gaya APA
Suharsih, S. (2010).
Learning How to Ask, Give and refuse opinion and to express likeness and dislikeness .
Jakarta:
Citraunggul.
Gaya MLA
Suharsih, Siti.
"Learning How to Ask, Give and refuse opinion and to express likeness and dislikeness".
Jakarta:
Citraunggul,
2010.
Pengayaan.