توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Heisig, J. P. (2015). Late-career Risks in Changing Welfare States: Comparing Germany and the United States since the 1980s. Amsterdam University Press.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Heisig, Jan Paul. Late-career Risks in Changing Welfare States: Comparing Germany and the United States Since the 1980s. Amsterdam: Amsterdam University Press, 2015.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

Heisig, Jan Paul. Late-career Risks in Changing Welfare States: Comparing Germany and the United States Since the 1980s. Amsterdam University Press, 2015.