Groot, H. C. (2011). The peace corps - 50 years later: Some personal reminiscences. Bulletin of the American Historical Collection.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGroot, Hans C. "The Peace Corps - 50 Years Later: Some Personal Reminiscences." Bulletin of the American Historical Collection 2011.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGroot, Hans C. "The Peace Corps - 50 Years Later: Some Personal Reminiscences." Bulletin of the American Historical Collection, 2011.
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