Cita APA (7a ed.)

Trotsky, L. (1973). Lessons of Spain. s.n..

Cita Chicago Style (17a ed.)

Trotsky, Leon. Lessons of Spain. [S.I.: s.n., 1973.

Cita MLA (8a ed.)

Trotsky, Leon. Lessons of Spain. s.n., 1973.