Gaya APA
Suharsih, S. (2010).
Learning to thank, to apologize, and to express politeness (Cet.1).
Jakarta:
PT. Multazam Mulia Utama.
Gaya MLA
Suharsih, Siti.
"Learning to thank, to apologize, and to express politeness".
Cet.1
Jakarta:
PT. Multazam Mulia Utama,
2010.
Text.