Gaya APA
Evaluation studies review annual, volume 2. (1977).
California:
Sage Publications.
Gaya Chicago
Evaluation studies review annual, volume 2.
text.
California:
Sage Publications,
1977.
Tesis.
Gaya MLA
Evaluation studies review annual, volume 2.
text.
California:
Sage Publications,
1977.
Tesis.
Gaya Turabian
Evaluation studies review annual, volume 2.
California:
Sage Publications,
1977.
Tesis.