Tyrrell, G. (1898). Hard sayings: A selection of meditations and studies. Longmans, Green.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रTyrrell, George. Hard Sayings: A Selection of Meditations and Studies. London ; New York: Longmans, Green, 1898.
एमएलए (8वां संस्करण) प्रशस्ति पत्रTyrrell, George. Hard Sayings: A Selection of Meditations and Studies. Longmans, Green, 1898.
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