Παραπομπή APA

Joseph Lucas. (1976). Frontiers of life: Animals of mountains and poles. Aldus books Ltd.

Παραπομπή Chicago Style

Joseph Lucas. Frontiers of Life: Animals of Mountains and Poles. Aldus books Ltd, 1976.

Παραπομπή MLA

Joseph Lucas. Frontiers of Life: Animals of Mountains and Poles. Aldus books Ltd, 1976.