Cita APA (7a ed.)

Byrn, D. (1959). Evaluation in extension. U.S. Department of agriculture.

Cita Chicago Style (17a ed.)

Byrn, Darcie. Evaluation in Extension. [Lugar de publicación no identificado]: U.S. Department of agriculture, 1959.

Cita MLA (8a ed.)

Byrn, Darcie. Evaluation in Extension. U.S. Department of agriculture, 1959.