Cita APA (7th ed.)

ENGELS, F. (1950). Socialism: Utopian and scientific. Allen & Unwin.

Cita Chicago (17th ed.)

ENGELS, Frederick. Socialism: Utopian and Scientific. London: Allen & Unwin, 1950.

Cita MLA (9th ed.)

ENGELS, Frederick. Socialism: Utopian and Scientific. Allen & Unwin, 1950.