Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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