APA Style

Montresor, A. et al (1998). Guidelines for the Evaluation of Soil-Transmitted Helminthiasis and Schitosomiasis at Community Level . Geneva: World Health Organization.

MLA Style

Montresor, A. et al. "Guidelines for the Evaluation of Soil-Transmitted Helminthiasis and Schitosomiasis at Community Level". Geneva: World Health Organization, 1998. print.