APA

Silverberg R., . (1969). The challenge of climate: man and his environment. New York: Meredith Press.

Chicago

Silverberg Robert, . 1969. The challenge of climate: man and his environment. New York: Meredith Press.

Harvard

Silverberg R., . (1969). The challenge of climate: man and his environment. New York: Meredith Press.

MLA

Silverberg Robert, . The challenge of climate: man and his environment. New York: Meredith Press. 1969.