Cita APA (7a ed.)

Lang, A. (1904). Das Kausalproblem. J.P. Bachem.

Cita Chicago Style (17a ed.)

Lang, Albert. Das Kausalproblem. Köln: J.P. Bachem, 1904.

Cita MLA (9a ed.)

Lang, Albert. Das Kausalproblem. J.P. Bachem, 1904.