MLA

Leeuwen, C.J. van, and T.G Vermeire. Risk Assessment of Chemicals. Springer Netherlands, 2007.

APA

Leeuwen, C. van, & Vermeire, T. (2007). Risk Assessment of Chemicals. Springer Netherlands.

Chicago

Leeuwen, C.J. van, and T.G Vermeire. Risk Assessment of Chemicals. : Springer Netherlands, 2007.