Citazione Stile APA (7a Edizione)

Metzler, R. J. K., Hehl, F. W., & Kiefer, C. Black Holes: Theory and Observation: Proceedings of the 179th W.E. Heraeus SeminarHeld at Bad Honnef, Germany, 18-22 August 1997. Springer International Publishing.

Citazione stile Chigago Style (17a edizione)

Metzler, Ralph J. K., Friedrich W. Hehl, e Claus Kiefer. Black Holes: Theory and Observation: Proceedings of the 179th W.E. Heraeus SeminarHeld at Bad Honnef, Germany, 18-22 August 1997. Cham: Springer International Publishing.

Citatione MLA (8a ed.)

Metzler, Ralph J. K., et al. Black Holes: Theory and Observation: Proceedings of the 179th W.E. Heraeus SeminarHeld at Bad Honnef, Germany, 18-22 August 1997. Springer International Publishing.