Template:Gordon, 2009
- Gordon, D.P. 2009. 2. Phylum Placozoa: placozoans, trichoplaxes. Pp. 47–48 in: Gordon, D.P. (ed.). 2009. New Zealand inventory of biodiversity. Volume 1. Kingdom Animalia. Radiata, Lophotrochozoa, Deuterostomia. Canterbury University Press: Christchurch, New Zealand. ISBN 978-1-87725772-8. Reference page.