Lua APA (7ú heag.)

Não informado. (1969). Family Planning Perspectives. Allan Guttmacher Institute.

Lua i Stíl Chicago (17ú heag.)

Não informado. Family Planning Perspectives. New York: Allan Guttmacher Institute, 1969.

Lua MLA (8ú heag.)

Não informado. Family Planning Perspectives. Allan Guttmacher Institute, 1969.

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