Cita APA (7th ed.)

National Council for the Social Studies. (1954). Skill in social studies. [s.n.].

Cita Chicago (17th ed.)

National Council for the Social Studies. Skill in Social Studies. Washington, D.C: [s.n.], 1954.

Cita MLA (9th ed.)

National Council for the Social Studies. Skill in Social Studies. [s.n.], 1954.