Cita APA (7a ed.)

Arnn, L., & Kelsey, C. (1989). Strategies for early intervention programs: From planning to service delivery. Vort.

Cita Chicago Style (17a ed.)

Arnn, Loretta, y Chris Kelsey. Strategies for Early Intervention Programs: From Planning to Service Delivery. Palo Alto: Vort, 1989.

Cita MLA (9a ed.)

Arnn, Loretta, y Chris Kelsey. Strategies for Early Intervention Programs: From Planning to Service Delivery. Vort, 1989.