Παραπομπή APA

Heller, E. D. (1971). Value management: Value engineering and cost reduction. Addison - Wesley.

Παραπομπή Chicago Style

Heller, Edward D. Value Management: Value Engineering and Cost Reduction. London: Addison - Wesley, 1971.

Παραπομπή MLA

Heller, Edward D. Value Management: Value Engineering and Cost Reduction. Addison - Wesley, 1971.