APA
World Health Organization. Department of Essential Drugs and Medicines Policy, Barnes K. I., Henning R. H., Kocabasoglu Y. E., Moller H., Smith A. J., Summers R. S., De Vries T. & Hogerzeil H. V. . [. a. (2001). Teacher's guide to good prescribing. Geneva: World Health Organization.
Chicago
World Health Organization. Department of Essential Drugs and Medicines Policy, Barnes Karen I, Henning Rob H, Kocabasoglu Yunus E, Moller Helene, Smith Anthony J, Summers Rob S, De Vries TPGm and Hogerzeil Hans V [et al.]. 2001. Teacher's guide to good prescribing. Geneva: World Health Organization.
Harvard
World Health Organization. Department of Essential Drugs and Medicines Policy, Barnes K. I., Henning R. H., Kocabasoglu Y. E., Moller H., Smith A. J., Summers R. S., De Vries T. and Hogerzeil H. V. . [. a. (2001). Teacher's guide to good prescribing. Geneva: World Health Organization.
MLA
World Health Organization. Department of Essential Drugs and Medicines Policy, Barnes Karen I, Henning Rob H, Kocabasoglu Yunus E, Moller Helene, Smith Anthony J, Summers Rob S, De Vries TPGm and Hogerzeil Hans V [et al.]. Teacher's guide to good prescribing. Geneva: World Health Organization. 2001.