Gaya APA
Evaluations studies review vol.12. (1987).
London:
Sage.
Gaya Chicago
Evaluations studies review vol.12.
.
London:
Sage,
1987.
Text.
Gaya MLA
Evaluations studies review vol.12.
.
London:
Sage,
1987.
Text.
Gaya Turabian
Evaluations studies review vol.12.
London:
Sage,
1987.
Print.