APA استشهاد

Grandell, J. (1991). Aspects of risk theory. Springer- Verlag.

استشهاد بنمط شيكاغو

Grandell, Jan. Aspects of Risk Theory. New York: Springer- Verlag, 1991.

MLA استشهاد

Grandell, Jan. Aspects of Risk Theory. Springer- Verlag, 1991.