Gaya APA

Bulmer, M., Warwick, D, P. (1983). Social Research in Developing Countries; Surveys and Censuses in the Third World . Canada: John Wiley & Sons, Inc.

Gaya MLA

Bulmer, Martin., Warwick, Donald, P.. "Social Research in Developing Countries; Surveys and Censuses in the Third World". Canada: John Wiley & Sons, Inc, 1983. Text.