Citazione Stile APA (7a Edizione)

Hefferan, K., & O'Brien, J. (2010). Earth materials. Wiley-Blackwell.

Citazione stile Chigago Style (17a edizione)

Hefferan, Kevin, e John O'Brien. Earth Materials. Chichester, West Sussex, Eng: Wiley-Blackwell, 2010.

Citatione MLA (9a ed.)

Hefferan, Kevin, e John O'Brien. Earth Materials. Wiley-Blackwell, 2010.