Cita APA

Billings, W. D. (1964). Plants and the ecosystem. London: MacMillan and Co., Ltd.

Chicago Style Citation

Billings, W. D. Plants and the Ecosystem. London: MacMillan and Co., Ltd, 1964.

Cita MLA

Billings, W. D. Plants and the Ecosystem. London: MacMillan and Co., Ltd, 1964.

Atenció: Aquestes cites poden no estar 100% correctes.