APA (7th ed.) Citation

Kellerer, H., Pferschy, U., & Pisinger, D. (2004). Knapsack problems. Springer.

Chicago Style (17th ed.) Citation

Kellerer, Hans, Ulrich Pferschy, and David Pisinger. Knapsack Problems. Berlin ; Heidelberg: Springer, 2004.

MLA (9th ed.) Citation

Kellerer, Hans, et al. Knapsack Problems. Springer, 2004.