APA (7th ed.) Citation

Wambsganß, J., Paczyński, B., & Katz, N. (1989). Micro-lensing model for QSO 2237+0305. Gravitational lenses.

Chicago Style (17th ed.) Citation

Wambsganß, Joachim, Bohdan Paczyński, and Nick Katz. "Micro-lensing Model for QSO 2237+0305." Gravitational Lenses 1989.

MLA (9th ed.) Citation

Wambsganß, Joachim, et al. "Micro-lensing Model for QSO 2237+0305." Gravitational Lenses, 1989.