Lua APA (7ú heag.)

American Psychological Association, Division of Population and. (1980). Population and Environment. Human Sciences Press.

Lua i Stíl Chicago (17ú heag.)

American Psychological Association, Division of Population and. Population and Environment. New York: Human Sciences Press, 1980.

Lua MLA (8ú heag.)

American Psychological Association, Division of Population and. Population and Environment. Human Sciences Press, 1980.

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