APA (7th ed.) Citation

Silverberg, R. (1977). Galactic dreamers: Science fiction as visionary literature. Random House.

Chicago Style (17th ed.) Citation

Silverberg, Robert. Galactic Dreamers: Science Fiction as Visionary Literature. New York: Random House, 1977.

MLA (9th ed.) Citation

Silverberg, Robert. Galactic Dreamers: Science Fiction as Visionary Literature. Random House, 1977.

Warning: These citations may not always be 100% accurate.