Citazione Stile APA (7a Edizione)

Long, H. C. (1934). Weed suppression by fertilizers and chemicals. H.C. Long.

Citazione stile Chigago Style (17a edizione)

Long, H. C. Weed Suppression by Fertilizers and Chemicals. Surbiton, Surrey: H.C. Long, 1934.

Citatione MLA (8a ed.)

Long, H. C. Weed Suppression by Fertilizers and Chemicals. H.C. Long, 1934.