APA (7th ed.) Citation

(1981). Ketchup. Burkert-Müller-Verl.

Chicago Style (17th ed.) Citation

Ketchup. Heidelberg: Burkert-Müller-Verl, 1981.

MLA (9th ed.) Citation

Ketchup. Burkert-Müller-Verl, 1981.

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