Dabb, A., Lie, C., Stone, E., Ruffs, & Crowley, B. (2008). G.I. Joe SIGMA 6 (Exclusive reinforced library bound ed.). Spotlight.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDabb, Andrew, Chris Lie, Emily Stone, Ruffs, और Brian Crowley. G.I. Joe SIGMA 6. Exclusive reinforced library bound ed. Edina, Minn.: Spotlight, 2008.
एमएलए (8वां संस्करण) प्रशस्ति पत्रDabb, Andrew, et al. G.I. Joe SIGMA 6. Exclusive reinforced library bound ed. Spotlight, 2008.
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