Citazione APA

Hafstad, M. R., & Hafstad, G. E. (1944). Use without waste: Units on conservation. Webster Pub. Co..

Stile di citazione Chicago

Hafstad, Margaret Riggs, e George Edwin Hafstad. Use Without Waste: Units on Conservation. St. Louis: Webster Pub. Co., 1944.

Citazione MLA

Hafstad, Margaret Riggs, e George Edwin Hafstad. Use Without Waste: Units on Conservation. Webster Pub. Co., 1944.