Collins, N.M. and Morris, M.G. (1985). Threatened Swallowtail Butterflies of the World. The IUCN Red Data Book. IUCN, Gland and Cambridge. Vii+401pp. +8 pls.
May be downloaded here: https://portals.iucn.org/library/node/6844
New, T.R. and Collins, N.M. (1991). Swallowtail Butterflies: An Action Plan for Their Conservation. IUCN, Gland, Switzerland. 36pp.
May be downloaded here: https://portals.iucn.org/library/node/6023
Collins, N.M. (1987). Butterfly Houses in Britain: the conservation implications. IUCN, Cambridge. 60pp.
Mitchell, D.K., Dewhurst, C.F., Tennent, W.J. and Page, W.W. (2016). Queen Alexandra’s Birdwing. Southdene Sdn. Bhd, Malaysia. 88pp.