The class struggle (from the Erfurt programme).

MLA

Kautsky, Karl. The Class Struggle (from the Erfurt Programme). London: Twentieth Century, 1912.

APA

Kautsky, K. (1912). The class struggle (from the Erfurt programme). London: Twentieth Century.

Chicago

Kautsky, Karl The Class Struggle (from the Erfurt Programme). London: Twentieth Century, 1912.