Citazione Stile APA (7a Edizione)

Copperfield, D. (1983). How to pump water with solar electricity. Well-Being Productions.

Citazione stile Chigago Style (17a edizione)

Copperfield, David. How to Pump Water with Solar Electricity. Rough and Ready: Well-Being Productions, 1983.

Citatione MLA (9a ed.)

Copperfield, David. How to Pump Water with Solar Electricity. Well-Being Productions, 1983.