Gaya APA
Ostrowska, S. (2014).
Unlock: Listening & Speaking Skills 3 — Student’s Book (3rd Printing).
Dubai:
Cambridge Universty Pss.
Gaya MLA
Ostrowska, Sabina.
"Unlock: Listening & Speaking Skills 3 — Student’s Book".
3rd Printing
Dubai:
Cambridge Universty Pss,
2014.
Print.