Gaya APA
Riyanto, S. (2011).
How to Write a Letter of Aplication in English :Pastikan anda bisa.... .
Yogyakarta:
Pustaka Widyatama.
Gaya MLA
Riyanto, Slamet.
"How to Write a Letter of Aplication in English :Pastikan anda bisa....".
Yogyakarta:
Pustaka Widyatama,
2011.
Text.