Não informado. (1968). Focus on guidance. American Personnel and Guidance Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Focus on Guidance. Denver, Colo: American Personnel and Guidance Association, 1968.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Focus on Guidance. American Personnel and Guidance Association, 1968.
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