Cita APA (7a ed.)

Sommerhoff, W. (1967). Cooperative housing in Chile. [s.n.].

Cita Chicago Style (17a ed.)

Sommerhoff, Walter. Cooperative Housing in Chile. [S.l.]: [s.n.], 1967.

Cita MLA (9a ed.)

Sommerhoff, Walter. Cooperative Housing in Chile. [s.n.], 1967.