Gaya APA
Widdowson, Peter. (1999).
Literature (Cetakan Pertama).
London:
Routledge.
Gaya Chicago
Widdowson, Peter.
Literature.
Cetakan Pertama
London:
Routledge,
1999.
Text.
Gaya MLA
Widdowson, Peter.
Literature.
Cetakan Pertama
London:
Routledge,
1999.
Text.
Gaya Turabian
Widdowson, Peter.
Literature.
Cetakan Pertama
London:
Routledge,
1999.
Print.