APA (7th ed.) Citation

Freytag, B., & Ludwig, H. (1997). On the scale of photospheric convection. Science with the VLT interferometer.

Chicago Style (17th ed.) Citation

Freytag, Bernd, and Hans-Günter Ludwig. "On the Scale of Photospheric Convection." Science with the VLT Interferometer 1997.

MLA (9th ed.) Citation

Freytag, Bernd, and Hans-Günter Ludwig. "On the Scale of Photospheric Convection." Science with the VLT Interferometer, 1997.

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