APA استشهاد

Penna, A. N., & Rivers, J. S. (2013). Natural disasters in a global environment. John Wiley & Sons.

استشهاد بنمط شيكاغو

Penna, Anthony N., و Jennifer S. Rivers. Natural Disasters in a Global Environment. U K: John Wiley & Sons, 2013.

MLA استشهاد

Penna, Anthony N., و Jennifer S. Rivers. Natural Disasters in a Global Environment. John Wiley & Sons, 2013.