Gaya APA
Ross, John. (2014).
Step to: advanced. Student book (2nd edition).
n.p.:
Anglia Education Group.
Gaya Chicago
Ross, John.
Step to: advanced. Student book.
2nd edition
n.p.:
Anglia Education Group,
2014.
Loan Book.
Gaya MLA
Ross, John.
Step to: advanced. Student book.
2nd edition
n.p.:
Anglia Education Group,
2014.
Loan Book.
Gaya Turabian
Ross, John.
Step to: advanced. Student book.
2nd edition
n.p.:
Anglia Education Group,
2014.
Loan Book.