APA (7th ed.) Citation

Simak, C. D., & Van Vogt, A. E. (1978). Our children's children: Science fiction. Sidgwick & Jackson.

Chicago Style (17th ed.) Citation

Simak, Clifford D., and Alfred Elton Van Vogt. Our Children's Children: Science Fiction. London: Sidgwick & Jackson, 1978.

MLA (9th ed.) Citation

Simak, Clifford D., and Alfred Elton Van Vogt. Our Children's Children: Science Fiction. Sidgwick & Jackson, 1978.