Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.
APA Citation Edition CitationSteffen, H. (1975). 1975 Photomap [Jemen]: Approx. 1:25'000; Ta'izz - J.Sabir, Y.A.R. Dept. of Geography, Univ..
Chicago Citation Edition CitationSteffen, Hans. 1975 Photomap [Jemen]: Approx. 1:25'000; Ta'izz - J.Sabir, Y.A.R. Zurich: Dept. of Geography, Univ., 1975.
MLA Citation Edition CitationSteffen, Hans. 1975 Photomap [Jemen]: Approx. 1:25'000; Ta'izz - J.Sabir, Y.A.R. Dept. of Geography, Univ., 1975.