Guntner, T. A. (1994). Learning Apollo: Basic and advanced training. South-Western Pub. Co.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGuntner, Talula Austin. Learning Apollo: Basic and Advanced Training. Cincinnati, Ohio: South-Western Pub. Co, 1994.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGuntner, Talula Austin. Learning Apollo: Basic and Advanced Training. South-Western Pub. Co, 1994.
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