Catford, J. A., Vesk, P. A., Richardson, D. M., & Pyšek, P. (2012). Quantifying levels of biological invasion: Towards the objective classification of invaded and invasible ecosystems. Blackwell Publishing Ltd.
استشهاد بنمط شيكاغوCatford, Jane A., Peter A. Vesk, David M. Richardson, و Petr Pyšek. Quantifying Levels of Biological Invasion: Towards the Objective Classification of Invaded and Invasible Ecosystems. Blackwell Publishing Ltd, 2012.
MLA استشهادCatford, Jane A., Peter A. Vesk, David M. Richardson, و Petr Pyšek. Quantifying Levels of Biological Invasion: Towards the Objective Classification of Invaded and Invasible Ecosystems. Blackwell Publishing Ltd, 2012.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.