Tohutoro APA (7th ed.)

Helmers, F. L. C. H. (1979). Project planning and income distribution. M. Nijhoff Pub..

Tohutoru Kātū Chicago (17th ed.)

Helmers, F. L. C. H. Project Planning and Income Distribution. Boston: M. Nijhoff Pub., 1979.

Tohutoro MLA (9th ed.)

Helmers, F. L. C. H. Project Planning and Income Distribution. M. Nijhoff Pub., 1979.

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