Citazione Stile APA (7a Edizione)

Billings, M. P. (1999). Structural geology (3rd ed.). Prentice-Hall of India Private Limited.

Citazione stile Chigago Style (17a edizione)

Billings, Marland P. Structural Geology. 3rd ed. New Delhi: Prentice-Hall of India Private Limited, 1999.

Citatione MLA (9a ed.)

Billings, Marland P. Structural Geology. 3rd ed. Prentice-Hall of India Private Limited, 1999.