Παραπομπή APA

Hornbein, T. F. (1965). Everest: West ridge. GAU.

Παραπομπή Chicago Style

Hornbein, Thomas F. Everest: West Ridge. London: GAU, 1965.

Παραπομπή MLA

Hornbein, Thomas F. Everest: West Ridge. GAU, 1965.