APA

Pryde P. R., . (1972). Conservation in the Soviet Union. Cambridge: University Press.

Chicago

Pryde Philip R, . 1972. Conservation in the Soviet Union. Cambridge: University Press.

Harvard

Pryde P. R., . (1972). Conservation in the Soviet Union. Cambridge: University Press.

MLA

Pryde Philip R, . Conservation in the Soviet Union. Cambridge: University Press. 1972.