APA (7th ed.) Citation

Billings, W. D. (1964). Plants and the ecosystem / by William Dwight Billings. Macmillan.

Chicago Style (17th ed.) Citation

Billings, William Dwight. Plants and the Ecosystem / by William Dwight Billings. Macmillan, 1964.

MLA (9th ed.) Citation

Billings, William Dwight. Plants and the Ecosystem / by William Dwight Billings. Macmillan, 1964.

Warning: These citations may not always be 100% accurate.