APA (7th ed.) Citation

Szalay, A. Virtual Observatories. SPIE Digital Library.

Chicago Style (17th ed.) Citation

Szalay, Alexander. Virtual Observatories. SPIE Digital Library.

MLA (8th ed.) Citation

Szalay, Alexander. Virtual Observatories. SPIE Digital Library.

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