APA (7th ed.) Citation

Silverberg, R. (1968). The time-hoppers: Science fiction. Sidwick & Jackson.

Chicago Style (17th ed.) Citation

Silverberg, Robert. The Time-hoppers: Science Fiction. London: Sidwick & Jackson, 1968.

MLA (8th ed.) Citation

Silverberg, Robert. The Time-hoppers: Science Fiction. Sidwick & Jackson, 1968.

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