Cita APA (7th ed.)

Johnstone, P. T., Paré, R., Rosewburgh, R. D., Schumacher, D., Wood, R. J., & Wraith, G. C. (1978). Indexed categories and their applications. Springer-Verlag.

Cita Chicago (17th ed.)

Johnstone, P. T., R. Paré, R. D. Rosewburgh, D. Schumacher, R. J. Wood, i G. C. Wraith. Indexed Categories and Their Applications. Berlín: Springer-Verlag, 1978.

Cita MLA (9th ed.)

Johnstone, P. T., et al. Indexed Categories and Their Applications. Springer-Verlag, 1978.