Citazione APA

Collings, G. H. (1955). Commercial fertilizers their source and use (5.). Mc Graw- Hill Book Company Inc.

Stile di citazione Chicago

Collings, Gilbert H. Commercial Fertilizers Their Source and Use. 5. New York: Mc Graw- Hill Book Company Inc, 1955.

Citazione MLA

Collings, Gilbert H. Commercial Fertilizers Their Source and Use. 5. Mc Graw- Hill Book Company Inc, 1955.