APA (7th ed.) Citation

Sillanpää, A., Heidt, J., & Bock, H. A. (1994). Coordinated multifrequency observations of OJ 287 and Mk 421 (March 1993). Multi-wavelength continuum emission of agn.

Chicago Style (17th ed.) Citation

Sillanpää, Aimo, Jochen Heidt, and Holger Arne Bock. "Coordinated Multifrequency Observations of OJ 287 and Mk 421 (March 1993)." Multi-wavelength Continuum Emission of Agn 1994.

MLA (9th ed.) Citation

Sillanpää, Aimo, et al. "Coordinated Multifrequency Observations of OJ 287 and Mk 421 (March 1993)." Multi-wavelength Continuum Emission of Agn, 1994.