Cita APA (7a ed.)

Astill, G., Grant, A., & Williams, B. (1992). The Countryside of medieval England. Basil Blackwell.

Cita Chicago Style (17a ed.)

Astill, Grenville, Annie Grant, y Brian Williams. The Countryside of Medieval England. Oxford [etc.]: Basil Blackwell, 1992.

Cita MLA (9a ed.)

Astill, Grenville, et al. The Countryside of Medieval England. Basil Blackwell, 1992.