Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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