Cita APA (7a ed.)

Hartwig, U., Wlassitschau, R., & Adrian, M. (1991). Rohstoffhandel. Horlemann.

Cita Chicago Style (17a ed.)

Hartwig, Uwe, Regine Wlassitschau, y Michael Adrian. Rohstoffhandel. Unkel/Rhein Bad Honnef: Horlemann, 1991.

Cita MLA (9a ed.)

Hartwig, Uwe, et al. Rohstoffhandel. Horlemann, 1991.