Cita APA (7a ed.)

Hugh Baddeley Productions, Educational Foundation for Visual Aids (Great Britain), Baddeley, W. H., & Graham, D. (1977). The Agrarian revolution. Hugh Baddeley Productions.

Cita Chicago Style (17a ed.)

Hugh Baddeley Productions, Educational Foundation for Visual Aids (Great Britain), W. Hugh Baddeley, y Dick Graham. The Agrarian Revolution. Hatfield, England: Hugh Baddeley Productions, 1977.

Cita MLA (8a ed.)

Hugh Baddeley Productions, et al. The Agrarian Revolution. Hugh Baddeley Productions, 1977.