APA (7e ed.) Bronvermelding

Não informado. (1937). Plant inventory. Bureau of Plant Industry, Soils and Agricultural Engineering.

Chicago (17e ed.) Bronvermelding

Não informado. Plant Inventory. Washington: Bureau of Plant Industry, Soils and Agricultural Engineering, 1937.

MLA (8e ed.) Bronvermelding

Não informado. Plant Inventory. Bureau of Plant Industry, Soils and Agricultural Engineering, 1937.

Let op: Deze citaties zijn niet altijd 100% accuraat.