Basic Polish : a grammar and workbook / Dana Bielec. — Ed. 2. — New York : Routledge, 2015. — 256 s. — (Routledge Grammar Workbooks). — ISBN:978-0-415-72601-6
Basic Polish : a grammar and workbook / Dana Bielec. — Ed. 2. — New York : Routledge, 2015. — 256 s. — (Routledge Grammar Workbooks). — ISBN:978-0-415-72601-6