Schamschula, R. G. (1978). WHO study of dental caries etiology in Papua New Guinea. World Health Organization.
芝加哥风格引文Schamschula, R. G. WHO Study of Dental Caries Etiology in Papua New Guinea. Geneva: World Health Organization, 1978.
MLA引文Schamschula, R. G. WHO Study of Dental Caries Etiology in Papua New Guinea. World Health Organization, 1978.
警告：这些引文格式不一定是100％准确.