APA استشهاد

Leftwich, R. H. (1979). Price system and resource allocation rev ed 1964 (7th ed.).

استشهاد بنمط شيكاغو

Leftwich, Richard H. Price System and Resource Allocation Rev Ed 1964. 7th ed. 1979.

MLA استشهاد

Leftwich, Richard H. Price System and Resource Allocation Rev Ed 1964. 7th ed. 1979.