Citazione Stile APA (7a Edizione)

Hobbs, J. J. (2017). Fundamentals of world regional geography (Fourth edition, Student edition.). Cengage Learning.

Citazione stile Chigago Style (17a edizione)

Hobbs, Joseph John. Fundamentals of World Regional Geography. Fourth edition, Student edition. Boston, MA: Cengage Learning, 2017.

Citatione MLA (9a ed.)

Hobbs, Joseph John. Fundamentals of World Regional Geography. Fourth edition, Student edition. Cengage Learning, 2017.