Linn, H. H., Helm, L. C., & Grabardiewicz, K. P. (1948). The school custodian's housekeeping handbook. Bureau of Publications, Teachers College, Columbia Univ.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLinn, Henry Harold, Leslie C. Helm, और Kazmer P. Grabardiewicz. The School Custodian's Housekeeping Handbook. New York: Bureau of Publications, Teachers College, Columbia Univ, 1948.
एमएलए (9वां संस्करण) प्रशस्ति पत्रLinn, Henry Harold, et al. The School Custodian's Housekeeping Handbook. Bureau of Publications, Teachers College, Columbia Univ, 1948.
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