Cita APA (7a ed.)

Houston, W. R. (1974). Competency assessment, research, and evaluation. s.n.

Cita Chicago Style (17a ed.)

Houston, W. Robert. Competency Assessment, Research, and Evaluation. [s.l.: s.n, 1974.

Cita MLA (9a ed.)

Houston, W. Robert. Competency Assessment, Research, and Evaluation. s.n, 1974.