Cita APA (7a ed.)

Gardiner, C. (1994). An introduction to geology. DPH.

Cita Chicago Style (17a ed.)

Gardiner, C.I. An Introduction to Geology. New Delhi: DPH, 1994.

Cita MLA (9a ed.)

Gardiner, C.I. An Introduction to Geology. DPH, 1994.