Roos, H. (1966). A history of modern Poland: From the foundation of the State in the First World War to the present day. London: Eyre & Spottiswoode.
শিকাগো স্টাইলে সাইটেশনRoos, Hans. A History of Modern Poland: From the Foundation of the State in the First World War to the Present Day. London: Eyre & Spottiswoode, 1966.
এমএলএ সাইটেশনRoos, Hans. A History of Modern Poland: From the Foundation of the State in the First World War to the Present Day. London: Eyre & Spottiswoode, 1966.
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