APA استشهاد

Brain, R. (1972). Into the primitive environment survival on the edge of our civilization. George Philip.

استشهاد بنمط شيكاغو

Brain, Robert. Into the Primitive Environment Survival on the Edge of Our Civilization. London: George Philip, 1972.

MLA استشهاد

Brain, Robert. Into the Primitive Environment Survival on the Edge of Our Civilization. George Philip, 1972.