Gaya APA
Helgesen,Marc. ().
Firsthand Success Beginner Course 2 .
Longman:
2000.
Gaya Chicago
Helgesen,Marc.
Firsthand Success Beginner Course 2.
Longman:
2000,
.
.
Gaya MLA
Helgesen,Marc.
Firsthand Success Beginner Course 2.
Longman:
2000,
.
.
Gaya Turabian
Helgesen,Marc.
Firsthand Success Beginner Course 2.
Longman:
2000,
.
.