Essl, F., Dullinger, S., Rabitsch, W., Hulme, P. E., Hülber, K., Jarošík, V., . . . Pyšek, P. (2011). Reply to Keller and Springborn: No doubt about invasion debt. National Academy of Sciences.
استشهاد بنمط شيكاغوEssl, Franz, et al. Reply to Keller and Springborn: No Doubt About Invasion Debt. National Academy of Sciences, 2011.
MLA استشهادEssl, Franz, et al. Reply to Keller and Springborn: No Doubt About Invasion Debt. National Academy of Sciences, 2011.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.