Collins, B. (2016). The rain in Portugal: Poems (First edition.). Random House.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCollins, Billy. The Rain in Portugal: Poems. First edition. New York: Random House, 2016.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCollins, Billy. The Rain in Portugal: Poems. First edition. Random House, 2016.
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