Wightman, M. (1992). Direkt!: A revision and practice resource for National Curriculum and S-grade German (2. ed., Natonal curriculum ed.). Murray.
Citazione stile Chigago Style (17a edizione)Wightman, Margaret. Direkt!: A Revision and Practice Resource for National Curriculum and S-grade German. 2. ed., Natonal curriculum ed. London: Murray, 1992.
Citatione MLA (9a ed.)Wightman, Margaret. Direkt!: A Revision and Practice Resource for National Curriculum and S-grade German. 2. ed., Natonal curriculum ed. Murray, 1992.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.