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MLA Citation
British Standards Institution,. BS EN ISO 23592. Service excellence. Principles and model.. London : British Standards Institution, 2020. http://access.bl.uk/ark:/81055/vdc_100106277983.0x000001
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British Standards Institution,. BS EN ISO 23592. Service excellence. Principles and model.. London : British Standards Institution, 2020. http://access.bl.uk/ark:/81055/vdc_100106277983.0x000001