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APA Citation
Hass, J., Heil, C., Bogacki, P., Weir, M. D., & 1914-2006, J. T. G. B. (. B. (2020). University calculus : early transcendentals. Harlow, Essex : Pearson Education Limited. http://access.bl.uk/ark:/81055/vdc_100086491068.0x000001