Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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