APA-čujuhus (7. p.)
Babbie, E. (1992). The practice of social research (6th ed.). Wadsworth.
Chicago-čujuhus (17. p.)
Babbie, Earl. The Practice of Social Research. 6th ed. California: Wadsworth, 1992.
MLA-čujuhus (9. p.)
Babbie, Earl. The Practice of Social Research. 6th ed. Wadsworth, 1992.
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