Cita APA (7a ed.)

Barker, R. L. (1999). Milestones. NASW Press.

Cita Chicago Style (17a ed.)

Barker, Robert L. Milestones. Washington, DC: NASW Press, 1999.

Cita MLA (9a ed.)

Barker, Robert L. Milestones. NASW Press, 1999.