Cita APA (7th ed.)

Bonington, C., & Grant, N. (1980). Everest: The hard way. Longman Group Ltd.

Cita Chicago (17th ed.)

Bonington, Chris, i Neville Grant. Everest: The Hard Way. Essex: Longman Group Ltd, 1980.

Cita MLA (9th ed.)

Bonington, Chris, i Neville Grant. Everest: The Hard Way. Longman Group Ltd, 1980.