Cita APA (American Psychological Association)

Trend, J. (1952). Berceo. [s.n.].

Citación Chicago Style

Trend, J.B. Berceo. Cambridge: [s.n.], 1952.

Cita MLA (Modern Language Association of America)

Trend, J.B. Berceo. [s.n.], 1952.