APA (7th ed.) Citation

Friedman, I. S. (1968). The developing countries in the past twenty years: Growth transformation and problems.

Chicago Style (17th ed.) Citation

Friedman, Irving S. The Developing Countries in the Past Twenty Years: Growth Transformation and Problems. [s.l. : s.n.], 1968.

MLA (9th ed.) Citation

Friedman, Irving S. The Developing Countries in the Past Twenty Years: Growth Transformation and Problems. 1968.