Citazione Stile APA (7a Edizione)

Donaldson, J. G. S., Barber, D., & Donaldson, F. L. (1972). Farming in Britain today. Penguin Books.

Citazione stile Chigago Style (17a edizione)

Donaldson, John George Stuart., Derek Barber, e Frances Lonsdale Donaldson. Farming in Britain Today. Harmondsworth: Penguin Books, 1972.

Citatione MLA (9a ed.)

Donaldson, John George Stuart., et al. Farming in Britain Today. Penguin Books, 1972.