Gaya APA
Beatty,Alexandra, . (2009).
STRENGTHENING BENEFIT-COST ANALYSIS;for Early Childhood Interventions .
America:
THE NATIONAL ACADEMIES PRESS.
Gaya MLA
Beatty,Alexandra, .
"STRENGTHENING BENEFIT-COST ANALYSIS;for Early Childhood Interventions".
America:
THE NATIONAL ACADEMIES PRESS,
2009.
Text.