Gaya APA
Willis, Dave. (1993).
Collins Cobuild Student's Grammar / Dave Willis (ed. 2, cet. 2).
London:
Harper Collins.
Gaya Chicago
Willis, Dave.
Collins Cobuild Student's Grammar / Dave Willis.
ed. 2, cet. 2
London:
Harper Collins,
1993.
Buku.
Gaya MLA
Willis, Dave.
Collins Cobuild Student's Grammar / Dave Willis.
ed. 2, cet. 2
London:
Harper Collins,
1993.
Buku.
Gaya Turabian
Willis, Dave.
Collins Cobuild Student's Grammar / Dave Willis.
ed. 2, cet. 2
London:
Harper Collins,
1993.
Buku.