APA

Lang N. P., Karring T. & Lindhe J. (1997). Proceedings of the 2nd European workshop on periodontology. Berlin: Quintessence.

Chicago

Lang Niklaus P, Karring Thorkild and Lindhe Jan. 1997. Proceedings of the 2nd European workshop on periodontology. Berlin: Quintessence.

Harvard

Lang N. P., Karring T. and Lindhe J. (1997). Proceedings of the 2nd European workshop on periodontology. Berlin: Quintessence.

MLA

Lang Niklaus P, Karring Thorkild and Lindhe Jan. Proceedings of the 2nd European workshop on periodontology. Berlin: Quintessence. 1997.