Daniel Wight, Gillian M Raab, Marion Henderson, Charles Abraham, Katie Buston, Graham Hart et al
Wight D, Raab G M, Henderson M, Abraham C, Buston K, Hart G et al.
Limits of teacher delivered sex education: interim behavioural outcomes from randomised trial
BMJ 2002; 324 :1430
doi:10.1136/bmj.324.7351.1430