APA (7th ed.) Citation

Riecken, O. (1997). Obstanbau in Hamburg. Hamburg in Zahlen.

Chicago Style (17th ed.) Citation

Riecken, Otto. "Obstanbau in Hamburg." Hamburg in Zahlen 1997.

MLA (8th ed.) Citation

Riecken, Otto. "Obstanbau in Hamburg." Hamburg in Zahlen, 1997.

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