APA (7th ed.) Citation

Kruse, A. (2007). Alter. Beltz Lexikon Pädagogik.

Chicago Style (17th ed.) Citation

Kruse, Andreas. "Alter." Beltz Lexikon Pädagogik 2007.

MLA (9th ed.) Citation

Kruse, Andreas. "Alter." Beltz Lexikon Pädagogik, 2007.

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