APA

Bickel P., Sieber N. & Kummer U. (2006). GRACE, Generalisation of research on accounts and cost estimation. Marginal environmental cost case studies for air and water transport. Stuttgart: Universität Stuttgart.

Chicago

Bickel Peter, Sieber Niklas and Kummer Ulrike. 2006. GRACE, Generalisation of research on accounts and cost estimation. Marginal environmental cost case studies for air and water transport. Stuttgart: Universität Stuttgart.

Harvard

Bickel P., Sieber N. and Kummer U. (2006). GRACE, Generalisation of research on accounts and cost estimation. Marginal environmental cost case studies for air and water transport. Stuttgart: Universität Stuttgart.

MLA

Bickel Peter, Sieber Niklas and Kummer Ulrike. GRACE, Generalisation of research on accounts and cost estimation. Marginal environmental cost case studies for air and water transport. Stuttgart: Universität Stuttgart. 2006.