Dertien, J. (1981). Eastern Nebraska's Country Schools. Country School Legacy: Humanities on the Frontier.
Cita Chicago Style (17a ed.)Dertien, James. Eastern Nebraska's Country Schools. Country School Legacy: Humanities on the Frontier. 1981.
Cita MLA (9a ed.)Dertien, James. Eastern Nebraska's Country Schools. Country School Legacy: Humanities on the Frontier. 1981.
Precaución: Estas citas no son 100% exactas.