APA

Niven D., . (1973). The moon’s a balloon. New York: Putnam.

Chicago

Niven David, . 1973. The moon’s a balloon. New York: Putnam.

Harvard

Niven D., . (1973). The moon’s a balloon. New York: Putnam.

MLA

Niven David, . The moon’s a balloon. New York: Putnam. 1973.