APA (7th ed.) Citation

Lancy, D. F., Souviney, R. J., & Kada, V. (1981). Intra-cultural variation in cognitive development: Conservation of length among the Imbonggu. Indigenous Mathematics Project.

Chicago Style (17th ed.) Citation

Lancy, David F., Randall J. Souviney, and Venina Kada. Intra-cultural Variation in Cognitive Development: Conservation of Length Among the Imbonggu. [Port Moresby]: Indigenous Mathematics Project, 1981.

MLA (9th ed.) Citation

Lancy, David F., et al. Intra-cultural Variation in Cognitive Development: Conservation of Length Among the Imbonggu. Indigenous Mathematics Project, 1981.