Beers, Elizabeth H.; Hoyt, Stanley C.; Willett, Michael J. (2010). "Aphelinus mali Haldeman". Orchard Pest Management Online. Washington State University. Archived from the original on 29 April 2017. Retrieved 14 April 2018.
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Beers, Elizabeth H.; Hoyt, Stanley C.; Willett, Michael J. (2010). "Aphelinus mali Haldeman". Orchard Pest Management Online. Washington State University. Archived from the original on 29 April 2017. Retrieved 14 April 2018.