West, T., Holub, J., Williams, S., & Phillips, C. (2019). Hercules and the nine-headed Hydra (First Aladdin paperback edition.). Aladdin.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWest, Tracey, Joan Holub, Suzanne Williams, और Craig Phillips. Hercules and the Nine-headed Hydra. First Aladdin paperback edition. New York: Aladdin, 2019.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWest, Tracey, et al. Hercules and the Nine-headed Hydra. First Aladdin paperback edition. Aladdin, 2019.
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