Cita APA (7a ed.)

Tönnies, F. (1974). Karl Marx: His life and teachings. Michigan State University.

Cita Chicago Style (17a ed.)

Tönnies, Ferdinand. Karl Marx: His Life and Teachings. Michigan: Michigan State University, 1974.

Cita MLA (8a ed.)

Tönnies, Ferdinand. Karl Marx: His Life and Teachings. Michigan State University, 1974.