King, A., Williams, L. J., & Mettke-Hofmann, C. (2012). Colourful characters: Head colour reflects personality in a social bird, the Gouldian finch, Erythrura gouldiae. Animal Behaviour, 84(1), pp. 159-165. doi:10.1016/j.anbehav.2012.04.025

King, Andrew, Leah J. Williams, and Claudia Mettke-Hofmann. "Colourful Characters: Head Colour Reflects Personality in a Social Bird, the Gouldian Finch, Erythrura Gouldiae." Animal Behaviour 84, no. 1 (2012): 159-165.

King, Andrew, Leah J. Williams, and Claudia Mettke-Hofmann. "Colourful Characters: Head Colour Reflects Personality in a Social Bird, the Gouldian Finch, Erythrura Gouldiae." Animal Behaviour 84.1 (2012): 159-165.