APA Style

X.1051, I, S, I, 2, I, R. (). Information technology – Security techniques – Information security management guidelines for telecommunications organizations based on ISO/IEC 27002 . : .

MLA Style

X.1051, INTERNATIONAL, STANDARD, ISO/IEC, 27011, ITU-T, RECOMMENDATION. "Information technology – Security techniques – Information security management guidelines for telecommunications organizations based on ISO/IEC 27002". : , . Management.