APA

(1978). Guide to Practical Project Appraisal: Social Benefit-Cost Analysis in Developing Countries. New York: United Nations ،.

Chicago

1978. Guide to Practical Project Appraisal: Social Benefit-Cost Analysis in Developing Countries. New York: United Nations ،.

Harvard

(1978). Guide to Practical Project Appraisal: Social Benefit-Cost Analysis in Developing Countries. New York: United Nations ،.

MLA

Guide to Practical Project Appraisal: Social Benefit-Cost Analysis in Developing Countries. New York: United Nations ،. 1978.