APA

Downs R. J., Hellmers H., . (1975). Environment and the experimental control of plant growth. New York: Academic.

Chicago

Downs R J, Hellmers H, . 1975. Environment and the experimental control of plant growth. New York: Academic.

Harvard

Downs R. J., Hellmers H., . (1975). Environment and the experimental control of plant growth. New York: Academic.

MLA

Downs R J, Hellmers H, . Environment and the experimental control of plant growth. New York: Academic. 1975.