Gaya APA
Peikola, M., Skaffari, J. (2009).
Instructional Writing in English (189).
Amsterdam:
Jhons benjamins publishing.
Gaya MLA
Peikola, Metti., Skaffari, Janne.
"Instructional Writing in English".
189
Amsterdam:
Jhons benjamins publishing,
2009.
Electronic Resource.