Cita APA (7th ed.)

Thompson, W. O. (1981). Concentric circles of concern. Broadman.

Cita Chicago (17th ed.)

Thompson, W. Oscar. Concentric Circles of Concern. Nashville: Broadman, 1981.

Cita MLA (9th ed.)

Thompson, W. Oscar. Concentric Circles of Concern. Broadman, 1981.