Linguaphone Institute. Duetscher Kursus. Liguaphone Institute.
Chicago Style (17th ed.) CitationLinguaphone Institute. Duetscher Kursus. London: Liguaphone Institute.
MLA (9th ed.) CitationLinguaphone Institute. Duetscher Kursus. Liguaphone Institute.
Warning: These citations may not always be 100% accurate.