A standard edition is The Works of Edmund Spenser: A Variorum Edition, ed. Edwin Greenlaw, et al. (9 vols.; Baltimore: The Johns Hopkins Press, 1932-49). A good single-volume edition, without notes, is The Poetical Works of Edmund Spenser, ed. J. C. Smith and E. de Selincourt (London: Oxford University Press, 1912).
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Hadfield, Andrew. "Spenser, Edmund (1552?–1599)." Oxford Dictionary of National Biography. Ed. H. C. G. Matthew and Brian Harrison. Oxford: OUP, 2004. Online ed. Ed. Lawrence Goldman. Jan. 2008.