APA (7th ed.) Citation

Krug, C. A., & Poerck, R. A. d. (1968). World coffee survey. Food and Agriculture Organization of the United Nations.

Chicago Style (17th ed.) Citation

Krug, C. A., and R. A. de Poerck. World Coffee Survey. Rome: Food and Agriculture Organization of the United Nations, 1968.

MLA (9th ed.) Citation

Krug, C. A., and R. A. de Poerck. World Coffee Survey. Food and Agriculture Organization of the United Nations, 1968.