Gaya APA
gonda, J.
(1998).
Research Synthesis and Meta-Analysis: a Step-by-Step Approach
(
Ed. 4)
.
wasington dc:
Sage.
Gaya MLA
gonda, J..
"Research Synthesis and Meta-Analysis: a Step-by-Step Approach".
Ed. 4
wasington dc:
Sage,
1998.
Text.