Isokangas, P. (1987). Xylitol chewing gum in caries prevention: A longitudinal study on Finnish school children. [s.n.].
Cita Chicago Style (17a ed.)Isokangas, Pauli. Xylitol Chewing Gum in Caries Prevention: A Longitudinal Study on Finnish School Children. Turku: [s.n.], 1987.
Cita MLA (8a ed.)Isokangas, Pauli. Xylitol Chewing Gum in Caries Prevention: A Longitudinal Study on Finnish School Children. [s.n.], 1987.
Precaución: Estas citas no son 100% exactas.