APA (7th ed.) Citation

Simak, C. D. (1981). The visitors: Science fiction. Sidgwick & Jackson.

Chicago Style (17th ed.) Citation

Simak, Clifford D. The Visitors: Science Fiction. London: Sidgwick & Jackson, 1981.

MLA (8th ed.) Citation

Simak, Clifford D. The Visitors: Science Fiction. Sidgwick & Jackson, 1981.

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