APA (7th ed.) Citation

Petring, A., & al, e. (2013). Welfare state and social democracy. 2nd ed. Bonn.

Chicago Style (17th ed.) Citation

Petring, Alexander, and et al. Welfare State and Social Democracy. 2nd Ed. Bonn, 2013.

MLA (8th ed.) Citation

Petring, Alexander, and et al. Welfare State and Social Democracy. 2nd Ed. Bonn, 2013.

Warning: These citations may not always be 100% accurate.