APA (7th ed.) Citation

Schlüter, I. (1999). 235-mal Zwillinge. Hamburg in Zahlen.

Chicago Style (17th ed.) Citation

Schlüter, Isolde. "235-mal Zwillinge." Hamburg in Zahlen 1999.

MLA (8th ed.) Citation

Schlüter, Isolde. "235-mal Zwillinge." Hamburg in Zahlen, 1999.

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