David, I. (1985). Keeping sample survey design and analysis simple. Asian Development Bank, Economics Office.
Citazione stile Chigago Style (17a edizione)David, I.P. Keeping Sample Survey Design and Analysis Simple. Manila: Asian Development Bank, Economics Office, 1985.
Citatione MLA (9a ed.)David, I.P. Keeping Sample Survey Design and Analysis Simple. Asian Development Bank, Economics Office, 1985.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.