Dyfyniad APA

Ellul, J., Gill, D. W., Richmond, L., & Lewis, T. (2017). Presence in the modern world. James Clarke & Co.

Dyfyniad Arddull Chicago

Ellul, Jacques, David W. Gill, Lisa Richmond, and Ted Lewis. Presence in the Modern World. Cambridge, United Kingdom: James Clarke & Co, 2017.

Dyfyniad MLA

Ellul, Jacques, et al. Presence in the Modern World. James Clarke & Co, 2017.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.