Cita APA (7a ed.)

Hoek, E., & Bray, J. W. (1981). Rock slope engineering (3th. ed. rev.). The Institution of Mining and Metallurgy.

Cita Chicago Style (17a ed.)

Hoek, Evert, y John W. Bray. Rock Slope Engineering. 3th. ed. rev. London: The Institution of Mining and Metallurgy, 1981.

Cita MLA (9a ed.)

Hoek, Evert, y John W. Bray. Rock Slope Engineering. 3th. ed. rev. The Institution of Mining and Metallurgy, 1981.