توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Sellin, B. (1991). The EC programme "Comparability of vocational training qualifications": Aims, working methods, evaluation. CEDEFOP--European Centre for the Development of Vocational Training ; UNIPUB [distributor].

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Sellin, Burkart. The EC Programme "Comparability of Vocational Training Qualifications": Aims, Working Methods, Evaluation. Berlin : Lanham, MD: CEDEFOP--European Centre for the Development of Vocational Training ; UNIPUB [distributor], 1991.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

Sellin, Burkart. The EC Programme "Comparability of Vocational Training Qualifications": Aims, Working Methods, Evaluation. CEDEFOP--European Centre for the Development of Vocational Training ; UNIPUB [distributor], 1991.