Whitford, F. (2017). Scattering the seeds of knowledge: The words and works of Indiana's pioneer county extension agents. Purdue University Press.
Citazione stile Chigago Style (17a edizione)Whitford, Fred. Scattering the Seeds of Knowledge: The Words and Works of Indiana's Pioneer County Extension Agents. West Lafayette, Indiana: Purdue University Press, 2017.
Citatione MLA (9a ed.)Whitford, Fred. Scattering the Seeds of Knowledge: The Words and Works of Indiana's Pioneer County Extension Agents. Purdue University Press, 2017.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.