Margulis, L., Corliss, J.O., Melkonian, M. & Chapman, D.J. (eds.) 1990. Handbook of Protoctista: The structure, cultivation, habitats and life histories of the eukaryotic microorganisms and their descendants exclusive of animals, plants and fungi: A guide to the algae, ciliates, foraminifera, sporozoa, water molds, slime. molds and the other protoctists. Jones and Bartlett Publishers, Boston.
Kingdom Protoctista (Hogg, 1860)