APA (7th ed.) Citation

Unruh, W. G. (1988). The Early Universe. Springer Netherlands. https://doi.org/10.1007/978-94-009-4015-4

Chicago Style (17th ed.) Citation

Unruh, W. G. The Early Universe. Dordrecht: Springer Netherlands, 1988. https://doi.org/10.1007/978-94-009-4015-4.

MLA (9th ed.) Citation

Unruh, W. G. The Early Universe. Springer Netherlands, 1988. https://doi.org/10.1007/978-94-009-4015-4.