Pak, G. (2014). Marvel's thor: ragnarok prelude: God of thunder vol. 4 - the last days of midgard - special. Marvel Worldwide, Inc..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPak, Greg. Marvel's Thor: Ragnarok Prelude: God of Thunder Vol. 4 - the Last Days of Midgard - Special. Cleveland: Marvel Worldwide, Inc., 2014.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPak, Greg. Marvel's Thor: Ragnarok Prelude: God of Thunder Vol. 4 - the Last Days of Midgard - Special. Marvel Worldwide, Inc., 2014.
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