Gaya APA
Suharsih, S. (2010).
Learning to Thank, to Apologize and to espress politeness .
Jakarta Timur:
MultazamMulia Utama.
Gaya MLA
Suharsih, Siti.
"Learning to Thank, to Apologize and to espress politeness".
Jakarta Timur:
MultazamMulia Utama,
2010.
Text.