Gaya APA
Alkin, M, C. (2004).
Evaluation roots: tracing theorists' viewa and influences .
Thousand Oaks, California:
SAGE Publications.
Gaya MLA
Alkin, Marvin, C..
"Evaluation roots: tracing theorists' viewa and influences".
Thousand Oaks, California:
SAGE Publications,
2004.
Text.