Tohutoro APA (7th ed.)
Stradal, O. (1961). Pictorial Guide to Vienna: Forew. by Otto Stradal. Pinguin-Verl.
Tohutoru Kātū Chicago (17th ed.)
Stradal, Otto. Pictorial Guide to Vienna: Forew. by Otto Stradal. Innsbruck: Pinguin-Verl, 1961.
Tohutoro MLA (9th ed.)
Stradal, Otto. Pictorial Guide to Vienna: Forew. by Otto Stradal. Pinguin-Verl, 1961.
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