APA aipamena

Billings, M. (1972). Structural Geology. Prentice-Hall of India.

Chicago Style aipamena

Billings, Marland.P. Structural Geology. Delhi: Prentice-Hall of India, 1972.

MLA aipamena

Billings, Marland.P. Structural Geology. Prentice-Hall of India, 1972.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.