Gaya APA
Developing Skills : Suplementary Written Exercises. (1971).
London:
[s.n.].
Gaya Chicago
Developing Skills : Suplementary Written Exercises.
; 2.
London:
[s.n.],
1971.
Text.
Gaya MLA
Developing Skills : Suplementary Written Exercises.
; 2.
London:
[s.n.],
1971.
Text.
Gaya Turabian
Developing Skills : Suplementary Written Exercises.
London:
[s.n.],
1971.
Print.