Citazione Stile APA (7a Edizione)

Hopkins, M., & King, T. (2005). Groundwork: Junior certificate geography. The Educational Company.

Citazione stile Chigago Style (17a edizione)

Hopkins, Monica, e Therese King. Groundwork: Junior Certificate Geography. Dublin: The Educational Company, 2005.

Citatione MLA (9a ed.)

Hopkins, Monica, e Therese King. Groundwork: Junior Certificate Geography. The Educational Company, 2005.