David, P. (2019). X-factor (2006), volume 2: Life and death matters. Marvel Worldwide, Inc..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDavid, Peter. X-factor (2006), Volume 2: Life and Death Matters. Cleveland: Marvel Worldwide, Inc., 2019.
एमएलए (8वां संस्करण) प्रशस्ति पत्रDavid, Peter. X-factor (2006), Volume 2: Life and Death Matters. Marvel Worldwide, Inc., 2019.
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