APA

Smith P. G. R., Theberge J. B., .Review of criteria for evaluating natural areas. : .

Chicago

Smith Paul G R, Theberge John B, .Review of criteria for evaluating natural areas. : .

Harvard

Smith P. G. R., Theberge J. B., .Review of criteria for evaluating natural areas. : .

MLA

Smith Paul G R, Theberge John B, .: . .