Gaya APA
Christophersen, Paul. (1969).
An Advanced English Grammar (- - -).
-:
-.
Gaya Chicago
Christophersen, Paul.
An Advanced English Grammar.
- - -
-:
-,
1969.
Buku.
Gaya MLA
Christophersen, Paul.
An Advanced English Grammar.
- - -
-:
-,
1969.
Buku.
Gaya Turabian
Christophersen, Paul.
An Advanced English Grammar.
- - -
-:
-,
1969.
Buku.