APA

Billings M. P., . (1954). Structural geology. New York: Prentice-Hall.

Chicago

Billings Marland Pratt, . 1954. Structural geology. New York: Prentice-Hall.

Harvard

Billings M. P., . (1954). Structural geology. New York: Prentice-Hall.

MLA

Billings Marland Pratt, . Structural geology. New York: Prentice-Hall. 1954.