Gaya APA
Written Language Instruction. (1982).
London:
[s.n.].
Gaya Chicago
Written Language Instruction.
.
London:
[s.n.],
1982.
Text.
Gaya MLA
Written Language Instruction.
.
London:
[s.n.],
1982.
Text.
Gaya Turabian
Written Language Instruction.
London:
[s.n.],
1982.
Print.