Παραπομπή σε μορφή APA (7η εκδ.)

Ziefle, H. Historical forces, German departments, and the curriculum in small liberal arts colleges in the Midwest: Helmut Ziefle. Teaching German in twentieth century America.(2001).

Παραπομπή σε μορφή Chicago (17η εκδ.)

Ziefle, Helmut. "Historical Forces, German Departments, and the Curriculum in Small Liberal Arts Colleges in the Midwest: Helmut Ziefle." Teaching German in Twentieth Century America.(2001) .

Παραπομπή σε μορφή MLA (8th εκδ.)

Ziefle, Helmut. "Historical Forces, German Departments, and the Curriculum in Small Liberal Arts Colleges in the Midwest: Helmut Ziefle." Teaching German in Twentieth Century America.(2001), .