APA

Lapp R. E., . (1961). Man and space the next decade. New York: Harper.

Chicago

Lapp Ralph E, . 1961. Man and space the next decade. New York: Harper.

Harvard

Lapp R. E., . (1961). Man and space the next decade. New York: Harper.

MLA

Lapp Ralph E, . Man and space the next decade. New York: Harper. 1961.