Gaya APA
Schoenberg, Irene E.. (2002).
Focus An Grammar : An Introduction Course For Reference An Practice .
United State America:
Longmaan.
Gaya Chicago
Schoenberg, Irene E..
Focus An Grammar : An Introduction Course For Reference An Practice.
United State America:
Longmaan,
2002.
Buku.
Gaya MLA
Schoenberg, Irene E..
Focus An Grammar : An Introduction Course For Reference An Practice.
United State America:
Longmaan,
2002.
Buku.
Gaya Turabian
Schoenberg, Irene E..
Focus An Grammar : An Introduction Course For Reference An Practice.
United State America:
Longmaan,
2002.
Buku.