(1981). Concentric circles of concern. Broadman Pr.
Cita Chicago Style (17a ed.)Concentric Circles of Concern. Nashville, Tenn: Broadman Pr, 1981.
Cita MLA (9a ed.)Concentric Circles of Concern. Broadman Pr, 1981.
Precaución: Estas citas no son 100% exactas.
