APA (7th ed.) Citation

Bullough, B., Bullough, V. L., & Elias, J. (1997). Gender blending. Prometheus Books.

Chicago Style (17th ed.) Citation

Bullough, Bonnie, Vern L. Bullough, and James Elias. Gender Blending. Amherst, NY: Prometheus Books, 1997.

MLA (9th ed.) Citation

Bullough, Bonnie, et al. Gender Blending. Prometheus Books, 1997.