What counts as credible evidence in applied research and evaluation practice?

Ngā taipitopito rārangi puna kōrero
Ētahi atu kaituhi: Donaldson, Stewart I. (Stewart Ian), Christie, Christina A., Mark, Melvin M.
Hōputu: Pukapuka
Reo:Ingarihi
I whakaputaina: Los Angeles, Calif. Sage c2009.
Ngā marau: