Cita APA (7a ed.)

Roberts, D., & Elfer, J. (2022). Into the great emptiness: Peril and survival on the greenland ice cap (Unabridged.). Blackstone Publishing.

Cita Chicago Style (17a ed.)

Roberts, David, y Julian Elfer. Into the Great Emptiness: Peril and Survival on the Greenland Ice Cap. Unabridged. Ashland: Blackstone Publishing, 2022.

Cita MLA (8a ed.)

Roberts, David, y Julian Elfer. Into the Great Emptiness: Peril and Survival on the Greenland Ice Cap. Unabridged. Blackstone Publishing, 2022.

Precaución: Estas citas no son 100% exactas.