APA

Holling C. S., . (1995). What barriers? what bridges?. New York: Columbia Press.

Chicago

Holling C S, . 1995. What barriers? what bridges?. New York: Columbia Press.

Harvard

Holling C. S., . (1995). What barriers? what bridges?. New York: Columbia Press.

MLA

Holling C S, . What barriers? what bridges?. New York: Columbia Press. 1995.