APA (7th ed.) Zitazioa
Ludwwig, E. (1960). The nile: The lifr-story of a river. George Allen.
Chicago Style (17th ed.) Zitazioa
Ludwwig, Emil. The Nile: The Lifr-story of a River. London: George Allen, 1960.
MLA (9th ed.) Zitazioa
Ludwwig, Emil. The Nile: The Lifr-story of a River. George Allen, 1960.
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