Παραπομπή APA

Artjur, W. (1990). The green machine: Ecology and the balance of nature. Blackwell.

Παραπομπή Chicago Style

Artjur, Wallace. The Green Machine: Ecology and the Balance of Nature. oxford: Blackwell, 1990.

Παραπομπή MLA

Artjur, Wallace. The Green Machine: Ecology and the Balance of Nature. Blackwell, 1990.