Tohutoro APA (7th ed.)
Bullock, A., Heilmann, U., & Boswell Fried, C. (1967). Die großen Ströme Europas: Great Rivers of Europe. Droemer Knaur.
Tohutoru Kātū Chicago (17th ed.)
Bullock, Alan, Ursula Heilmann, me Catherine Boswell Fried. Die Großen Ströme Europas: Great Rivers of Europe. München, Zürich: Droemer Knaur, 1967.
Tohutoro MLA (9th ed.)
Bullock, Alan, et al. Die Großen Ströme Europas: Great Rivers of Europe. Droemer Knaur, 1967.
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