APA

Bergaust E., . (1961). Rockets to the moon. New York: Putnam.

Chicago

Bergaust Erik, . 1961. Rockets to the moon. New York: Putnam.

Harvard

Bergaust E., . (1961). Rockets to the moon. New York: Putnam.

MLA

Bergaust Erik, . Rockets to the moon. New York: Putnam. 1961.