Stockhammer, R. "Lesen Sie before the letter:": Oskar Maria Graf in New York / Robert Stockhammer. "Escape to life" : German intellectuals in New York: a compendium on exile after 1933.(2012).
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रStockhammer, Robert. ""Lesen Sie Before the Letter:": Oskar Maria Graf in New York / Robert Stockhammer." "Escape to Life" : German Intellectuals in New York: A Compendium on Exile After 1933.(2012) .
एमएलए (8वां संस्करण) प्रशस्ति पत्रStockhammer, Robert. ""Lesen Sie Before the Letter:": Oskar Maria Graf in New York / Robert Stockhammer." "Escape to Life" : German Intellectuals in New York: A Compendium on Exile After 1933.(2012), .
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