American Society of Training Directors. (1961). Selected bibliographies covering twenty-seven training subjects. s.n.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAmerican Society of Training Directors. Selected Bibliographies Covering Twenty-seven Training Subjects. Madison, Wis: s.n, 1961.
एमएलए (9वां संस्करण) प्रशस्ति पत्रAmerican Society of Training Directors. Selected Bibliographies Covering Twenty-seven Training Subjects. s.n, 1961.
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