Citazione Stile APA (7a Edizione)

Pearl, R. (1918). General index numbers of food prices on a nutritive value base. United States Food Administration.

Citazione stile Chigago Style (17a edizione)

Pearl, Raymond. General Index Numbers of Food Prices on a Nutritive Value Base. Washington, D.C.: United States Food Administration, 1918.

Citatione MLA (8a ed.)

Pearl, Raymond. General Index Numbers of Food Prices on a Nutritive Value Base. United States Food Administration, 1918.