Dyfyniad APA

Lauer, R. H. (1998). Social problems and the quality of life (7th ed.).

Dyfyniad Arddull Chicago

Lauer, Rober H. Social Problems and the Quality of Life. 7th ed. McGraw-Hill, 1998.

Dyfyniad MLA

Lauer, Rober H. Social Problems and the Quality of Life. 7th ed. 1998.

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