Cita APA (7th ed.)

Engeln, O. D. v., & Caster, K. E. (1952). Geology. McGraw-Hill.

Cita Chicago (17th ed.)

Engeln, O. D. von, i Kenneth E. Caster. Geology. Nueva York: McGraw-Hill, 1952.

Cita MLA (9th ed.)

Engeln, O. D. von, i Kenneth E. Caster. Geology. McGraw-Hill, 1952.