Gaya APA
Suharsih, S. (2011).
Learning to Thank, to Apologize, and to Express Politeness (Cet 2).
Jakarta:
Multazam Mulia Utama.
Gaya MLA
Suharsih, Siti.
"Learning to Thank, to Apologize, and to Express Politeness".
Cet 2
Jakarta:
Multazam Mulia Utama,
2011.
text.