Ong, W. J. (1952). Basel, Switzerland, as seen across Barfüsser Platz.
Chicago Style (17. basım) AtıfOng, Walter J. Basel, Switzerland, as Seen Across Barfüsser Platz. 1952.
MLA (8th ed.) AtıfOng, Walter J. Basel, Switzerland, as Seen Across Barfüsser Platz. 1952.
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