Citazione APA

Purdue University. Cooperative Extension Service. AE. Purdue University, Cooperative Extension Service.

Stile di citazione Chicago

Purdue University. Cooperative Extension Service. AE. West Lafayette, IN: Purdue University, Cooperative Extension Service.

Citazione MLA

Purdue University. Cooperative Extension Service. AE. Purdue University, Cooperative Extension Service.

Attenzione: Queste citazioni potrebbero non essere precise al 100%.