Citazione APA

Smits, M. T., Arends, J., & van de Poel, A. (1987). Xylitol and dental caries. [s.n.].

Stile di citazione Chicago

Smits, Marten Titus, J. Arends, e A.C.M van de Poel. Xylitol and Dental Caries. Groningen: [s.n.], 1987.

Citazione MLA

Smits, Marten Titus, et al. Xylitol and Dental Caries. [s.n.], 1987.