Gaya APA
Michael Harris, David Mower, Anna Sikorzynska. (2010).
Challenges: Student's Book 2 .
Harlow:
.
Gaya Chicago
Michael Harris, David Mower, Anna Sikorzynska.
Challenges: Student's Book 2.
Harlow:
,
2010.
.
Gaya MLA
Michael Harris, David Mower, Anna Sikorzynska.
Challenges: Student's Book 2.
Harlow:
,
2010.
.
Gaya Turabian
Michael Harris, David Mower, Anna Sikorzynska.
Challenges: Student's Book 2.
Harlow:
,
2010.
.