Cita APA

Schamschula, R. G., & Schamschula, R. G. (1978). WHO study of dental caries etiology in Papua New Guinea. Geneva: World Health Organization.

Citación estilo Chicago

Schamschula, R. G., y R. G. Schamschula. WHO Study of Dental Caries Etiology in Papua New Guinea. Geneva: World Health Organization, 1978.

Cita MLA

Schamschula, R. G., y R. G. Schamschula. WHO Study of Dental Caries Etiology in Papua New Guinea. Geneva: World Health Organization, 1978.