APA (7th ed.) Citation

Sommer, H., Petersen, B., & Wittke, P. v. (1993). Safeguarding food quality. Springer.

Chicago Style (17th ed.) Citation

Sommer, Heiner, Brigitte Petersen, and Peter von Wittke. Safeguarding Food Quality. Berlin [etc.]: Springer, 1993.

MLA (9th ed.) Citation

Sommer, Heiner, et al. Safeguarding Food Quality. Springer, 1993.