Cita APA (7th ed.)

Landolt, P. L. (2000). Naturalis obligatio: And bare social duty (1a. ed.). Böhlau.

Cita Chicago (17th ed.)

Landolt, Phillip Louis. Naturalis Obligatio: And Bare Social Duty. 1a. ed. Colonia: Böhlau, 2000.

Cita MLA (9th ed.)

Landolt, Phillip Louis. Naturalis Obligatio: And Bare Social Duty. 1a. ed. Böhlau, 2000.